diff --git a/integration-tests/src/main/java/org/signal/integration/TestUser.java b/integration-tests/src/main/java/org/signal/integration/TestUser.java
index 8a7dbeff..56fd9a72 100644
--- a/integration-tests/src/main/java/org/signal/integration/TestUser.java
+++ b/integration-tests/src/main/java/org/signal/integration/TestUser.java
@@ -126,7 +126,7 @@ public class TestUser {
   }
 
   public AccountAttributes accountAttributes() {
-    return new AccountAttributes(true, registrationId, pniRegistrationId, "".getBytes(StandardCharsets.UTF_8), "", true, new Device.DeviceCapabilities(false, false, false, false))
+    return new AccountAttributes(true, registrationId, pniRegistrationId, "".getBytes(StandardCharsets.UTF_8), "", true, new Device.DeviceCapabilities(false, false, false, false, false))
         .withUnidentifiedAccessKey(unidentifiedAccessKey)
         .withRecoveryPassword(registrationPassword);
   }
diff --git a/service/src/main/java/org/whispersystems/textsecuregcm/controllers/DeviceController.java b/service/src/main/java/org/whispersystems/textsecuregcm/controllers/DeviceController.java
index af54cca8..483ec5cd 100644
--- a/service/src/main/java/org/whispersystems/textsecuregcm/controllers/DeviceController.java
+++ b/service/src/main/java/org/whispersystems/textsecuregcm/controllers/DeviceController.java
@@ -392,7 +392,10 @@ public class DeviceController {
   }
 
   private static boolean isCapabilityDowngrade(Account account, DeviceCapabilities capabilities) {
-    return account.isDeleteSyncSupported() && !capabilities.deleteSync();
+    boolean isDowngrade = false;
+    isDowngrade |= account.isDeleteSyncSupported() && !capabilities.deleteSync();
+    isDowngrade |= account.isVersionedExpirationTimerSupported() && !capabilities.versionedExpirationTimer();
+    return isDowngrade;
   }
 
   private static String getUsedTokenKey(final String token) {
diff --git a/service/src/main/java/org/whispersystems/textsecuregcm/entities/UserCapabilities.java b/service/src/main/java/org/whispersystems/textsecuregcm/entities/UserCapabilities.java
index 55192e1e..a6502660 100644
--- a/service/src/main/java/org/whispersystems/textsecuregcm/entities/UserCapabilities.java
+++ b/service/src/main/java/org/whispersystems/textsecuregcm/entities/UserCapabilities.java
@@ -8,11 +8,13 @@ package org.whispersystems.textsecuregcm.entities;
 import org.whispersystems.textsecuregcm.storage.Account;
 
 public record UserCapabilities(
-    // TODO: Remove the paymentActivation capability entirely sometime soon after 2024-06-30
+    // TODO: Remove the paymentActivation capability entirely sometime soon after 2024-10-07
     boolean paymentActivation,
-    boolean deleteSync) {
+    boolean deleteSync,
+    boolean versionedExpirationTimer) {
 
   public static UserCapabilities createForAccount(final Account account) {
-    return new UserCapabilities(true, account.isDeleteSyncSupported());
+    return new UserCapabilities(true, account.isDeleteSyncSupported(),
+        account.isVersionedExpirationTimerSupported());
   }
 }
diff --git a/service/src/main/java/org/whispersystems/textsecuregcm/grpc/DevicesGrpcService.java b/service/src/main/java/org/whispersystems/textsecuregcm/grpc/DevicesGrpcService.java
index 5f687465..4cb5aaa5 100644
--- a/service/src/main/java/org/whispersystems/textsecuregcm/grpc/DevicesGrpcService.java
+++ b/service/src/main/java/org/whispersystems/textsecuregcm/grpc/DevicesGrpcService.java
@@ -198,7 +198,8 @@ public class DevicesGrpcService extends ReactorDevicesGrpc.DevicesImplBase {
                     request.getStorage(),
                     request.getTransfer(),
                     request.getPaymentActivation(),
-                    request.getDeleteSync())))))
+                    request.getDeleteSync(),
+                    request.getVersionedExpirationTimer())))))
         .thenReturn(SetCapabilitiesResponse.newBuilder().build());
   }
 }
diff --git a/service/src/main/java/org/whispersystems/textsecuregcm/grpc/ProfileGrpcHelper.java b/service/src/main/java/org/whispersystems/textsecuregcm/grpc/ProfileGrpcHelper.java
index c4877541..09be841f 100644
--- a/service/src/main/java/org/whispersystems/textsecuregcm/grpc/ProfileGrpcHelper.java
+++ b/service/src/main/java/org/whispersystems/textsecuregcm/grpc/ProfileGrpcHelper.java
@@ -84,6 +84,7 @@ public class ProfileGrpcHelper {
     return UserCapabilities.newBuilder()
         .setPaymentActivation(capabilities.paymentActivation())
         .setDeleteSync(capabilities.deleteSync())
+        .setVersionedExpirationTimer(capabilities.versionedExpirationTimer())
         .build();
   }
 
diff --git a/service/src/main/java/org/whispersystems/textsecuregcm/storage/Account.java b/service/src/main/java/org/whispersystems/textsecuregcm/storage/Account.java
index 5cab0324..fd459522 100644
--- a/service/src/main/java/org/whispersystems/textsecuregcm/storage/Account.java
+++ b/service/src/main/java/org/whispersystems/textsecuregcm/storage/Account.java
@@ -296,6 +296,10 @@ public class Account {
     return allDevicesHaveCapability(DeviceCapabilities::deleteSync);
   }
 
+  public boolean isVersionedExpirationTimerSupported() {
+    return allDevicesHaveCapability(DeviceCapabilities::versionedExpirationTimer);
+  }
+
   private boolean allDevicesHaveCapability(final Predicate<DeviceCapabilities> predicate) {
     requireNotStale();
 
diff --git a/service/src/main/java/org/whispersystems/textsecuregcm/storage/Device.java b/service/src/main/java/org/whispersystems/textsecuregcm/storage/Device.java
index ee1eafc0..cfec4009 100644
--- a/service/src/main/java/org/whispersystems/textsecuregcm/storage/Device.java
+++ b/service/src/main/java/org/whispersystems/textsecuregcm/storage/Device.java
@@ -232,6 +232,7 @@ public class Device {
     return this.userAgent;
   }
 
-  public record DeviceCapabilities(boolean storage, boolean transfer, boolean paymentActivation, boolean deleteSync) {
+  public record DeviceCapabilities(boolean storage, boolean transfer, boolean paymentActivation, boolean deleteSync,
+                                   boolean versionedExpirationTimer) {
   }
 }
diff --git a/service/src/main/proto/org/signal/chat/device.proto b/service/src/main/proto/org/signal/chat/device.proto
index a6541a2f..9132c5d6 100644
--- a/service/src/main/proto/org/signal/chat/device.proto
+++ b/service/src/main/proto/org/signal/chat/device.proto
@@ -149,6 +149,7 @@ message SetCapabilitiesRequest {
   bool transfer = 2;
   bool paymentActivation = 3;
   bool deleteSync = 4;
+  bool versionedExpirationTimer = 5;
 }
 
 message SetCapabilitiesResponse {}
diff --git a/service/src/main/proto/org/signal/chat/profile.proto b/service/src/main/proto/org/signal/chat/profile.proto
index 790d946b..ff778e56 100644
--- a/service/src/main/proto/org/signal/chat/profile.proto
+++ b/service/src/main/proto/org/signal/chat/profile.proto
@@ -326,6 +326,10 @@ message UserCapabilities {
    * Whether all devices linked to the account support delete syncing
    */
   bool delete_sync = 2;
+  /**
+   * Whether all devices linked to the account support a versioned expiration timer
+   */
+  bool versioned_expiration_timer = 3;
 }
 
 message Badge {
diff --git a/service/src/test/java/org/whispersystems/textsecuregcm/controllers/DeviceControllerTest.java b/service/src/test/java/org/whispersystems/textsecuregcm/controllers/DeviceControllerTest.java
index a313d714..64bbe965 100644
--- a/service/src/test/java/org/whispersystems/textsecuregcm/controllers/DeviceControllerTest.java
+++ b/service/src/test/java/org/whispersystems/textsecuregcm/controllers/DeviceControllerTest.java
@@ -216,7 +216,7 @@ class DeviceControllerTest {
     when(asyncCommands.set(any(), any(), any())).thenReturn(MockRedisFuture.completedFuture(null));
 
     final AccountAttributes accountAttributes = new AccountAttributes(fetchesMessages, 1234, 5678, null,
-        null, true, new DeviceCapabilities(true, true, true, false));
+        null, true, new DeviceCapabilities(true, true, true, false, false));
 
     final LinkDeviceRequest request = new LinkDeviceRequest(deviceCode.verificationCode(),
         accountAttributes,
@@ -293,7 +293,7 @@ class DeviceControllerTest {
     when(asyncCommands.set(any(), any(), any())).thenReturn(MockRedisFuture.completedFuture(null));
 
     final LinkDeviceRequest request = new LinkDeviceRequest(deviceController.generateVerificationToken(AuthHelper.VALID_UUID),
-            new AccountAttributes(false, 1234, 5678, null, null, true, new DeviceCapabilities(true, true, true, deviceSupportsDeleteSync)),
+            new AccountAttributes(false, 1234, 5678, null, null, true, new DeviceCapabilities(true, true, true, deviceSupportsDeleteSync, false)),
             new DeviceActivationRequest(aciSignedPreKey, pniSignedPreKey, aciPqLastResortPreKey, pniPqLastResortPreKey, Optional.empty(), Optional.of(new GcmRegistrationId("gcm-id"))));
 
     try (final Response response = resources.getJerseyTest()
@@ -314,6 +314,59 @@ class DeviceControllerTest {
             Arguments.of(false, false, 200));
   }
 
+  @ParameterizedTest
+  @MethodSource
+  void deviceDowngradeVersionedExpirationTimer(final boolean accountSupportsVersionedExpirationTimer,
+      final boolean deviceSupportsVersionedExpirationTimer, final int expectedStatus) {
+    when(accountsManager.getByAccountIdentifier(AuthHelper.VALID_UUID)).thenReturn(Optional.of(account));
+    when(accountsManager.addDevice(any(), any()))
+        .thenReturn(CompletableFuture.completedFuture(new Pair<>(mock(Account.class), mock(Device.class))));
+
+    final Device primaryDevice = mock(Device.class);
+    when(primaryDevice.getId()).thenReturn(Device.PRIMARY_ID);
+    when(AuthHelper.VALID_ACCOUNT.getDevices()).thenReturn(List.of(primaryDevice));
+
+    final ECSignedPreKey aciSignedPreKey;
+    final ECSignedPreKey pniSignedPreKey;
+    final KEMSignedPreKey aciPqLastResortPreKey;
+    final KEMSignedPreKey pniPqLastResortPreKey;
+
+    final ECKeyPair aciIdentityKeyPair = Curve.generateKeyPair();
+    final ECKeyPair pniIdentityKeyPair = Curve.generateKeyPair();
+
+    aciSignedPreKey = KeysHelper.signedECPreKey(1, aciIdentityKeyPair);
+    pniSignedPreKey = KeysHelper.signedECPreKey(2, pniIdentityKeyPair);
+    aciPqLastResortPreKey = KeysHelper.signedKEMPreKey(3, aciIdentityKeyPair);
+    pniPqLastResortPreKey = KeysHelper.signedKEMPreKey(4, pniIdentityKeyPair);
+
+    when(account.getIdentityKey(IdentityType.ACI)).thenReturn(new IdentityKey(aciIdentityKeyPair.getPublicKey()));
+    when(account.getIdentityKey(IdentityType.PNI)).thenReturn(new IdentityKey(pniIdentityKeyPair.getPublicKey()));
+    when(account.isDeleteSyncSupported()).thenReturn(accountSupportsVersionedExpirationTimer);
+
+    when(asyncCommands.set(any(), any(), any())).thenReturn(MockRedisFuture.completedFuture(null));
+
+    final LinkDeviceRequest request = new LinkDeviceRequest(deviceController.generateVerificationToken(AuthHelper.VALID_UUID),
+        new AccountAttributes(false, 1234, 5678, null, null, true, new DeviceCapabilities(true, true, true, deviceSupportsVersionedExpirationTimer, false)),
+        new DeviceActivationRequest(aciSignedPreKey, pniSignedPreKey, aciPqLastResortPreKey, pniPqLastResortPreKey, Optional.empty(), Optional.of(new GcmRegistrationId("gcm-id"))));
+
+    try (final Response response = resources.getJerseyTest()
+        .target("/v1/devices/link")
+        .request()
+        .header("Authorization", AuthHelper.getProvisioningAuthHeader(AuthHelper.VALID_NUMBER, "password1"))
+        .put(Entity.entity(request, MediaType.APPLICATION_JSON_TYPE))) {
+
+      assertEquals(expectedStatus, response.getStatus());
+    }
+  }
+
+  private static List<Arguments> deviceDowngradeVersionedExpirationTimer() {
+    return List.of(
+        Arguments.of(true, true, 200),
+        Arguments.of(true, false, 409),
+        Arguments.of(false, true, 200),
+        Arguments.of(false, false, 200));
+  }
+
   @Test
   void linkDeviceAtomicBadCredentials() {
     when(accountsManager.getByAccountIdentifier(AuthHelper.VALID_UUID)).thenReturn(Optional.of(account));
@@ -683,7 +736,7 @@ class DeviceControllerTest {
     when(asyncCommands.set(any(), any(), any())).thenReturn(MockRedisFuture.completedFuture(null));
 
     final LinkDeviceRequest request = new LinkDeviceRequest(deviceCode.verificationCode(),
-        new AccountAttributes(false, registrationId, pniRegistrationId, null, null, true, new DeviceCapabilities(true, true, true, false)),
+        new AccountAttributes(false, registrationId, pniRegistrationId, null, null, true, new DeviceCapabilities(true, true, true, false, false)),
         new DeviceActivationRequest(aciSignedPreKey, pniSignedPreKey, aciPqLastResortPreKey, pniPqLastResortPreKey, Optional.of(new ApnRegistrationId("apn", null)), Optional.empty()));
 
     try (final Response response = resources.getJerseyTest()
@@ -742,7 +795,7 @@ class DeviceControllerTest {
 
   @Test
   void putCapabilitiesSuccessTest() {
-    final DeviceCapabilities deviceCapabilities = new DeviceCapabilities(true, true, true, false);
+    final DeviceCapabilities deviceCapabilities = new DeviceCapabilities(true, true, true, false, false);
     final Response response = resources
         .getJerseyTest()
         .target("/v1/devices/capabilities")
diff --git a/service/src/test/java/org/whispersystems/textsecuregcm/controllers/ProfileControllerTest.java b/service/src/test/java/org/whispersystems/textsecuregcm/controllers/ProfileControllerTest.java
index f4c2548f..57ccc3e2 100644
--- a/service/src/test/java/org/whispersystems/textsecuregcm/controllers/ProfileControllerTest.java
+++ b/service/src/test/java/org/whispersystems/textsecuregcm/controllers/ProfileControllerTest.java
@@ -59,6 +59,7 @@ import org.junit.jupiter.params.ParameterizedTest;
 import org.junit.jupiter.params.provider.Arguments;
 import org.junit.jupiter.params.provider.MethodSource;
 import org.junit.jupiter.params.provider.ValueSource;
+import org.junitpioneer.jupiter.cartesian.CartesianTest;
 import org.mockito.ArgumentCaptor;
 import org.signal.libsignal.protocol.IdentityKey;
 import org.signal.libsignal.protocol.ServiceId;
@@ -439,10 +440,12 @@ class ProfileControllerTest {
     assertThat(response.getStatus()).isEqualTo(401);
   }
 
-  @ParameterizedTest
-  @ValueSource(booleans = {true, false})
-  void testProfileCapabilities(final boolean isDeleteSyncSupported) {
+  @CartesianTest
+  void testProfileCapabilities(
+      @CartesianTest.Values(booleans = {true, false}) final boolean isDeleteSyncSupported,
+      @CartesianTest.Values(booleans = {true, false}) final boolean isVersionedExpirationTimerSupported) {
     when(capabilitiesAccount.isDeleteSyncSupported()).thenReturn(isDeleteSyncSupported);
+    when(capabilitiesAccount.isVersionedExpirationTimerSupported()).thenReturn(isVersionedExpirationTimerSupported);
     final BaseProfileResponse profile = resources.getJerseyTest()
         .target("/v1/profile/" + AuthHelper.VALID_UUID)
         .request()
@@ -450,6 +453,7 @@ class ProfileControllerTest {
         .get(BaseProfileResponse.class);
 
     assertEquals(isDeleteSyncSupported, profile.getCapabilities().deleteSync());
+    assertEquals(isVersionedExpirationTimerSupported, profile.getCapabilities().versionedExpirationTimer());
     assertThat(profile.getCapabilities().paymentActivation()).isTrue();
   }
 
diff --git a/service/src/test/java/org/whispersystems/textsecuregcm/controllers/RegistrationControllerTest.java b/service/src/test/java/org/whispersystems/textsecuregcm/controllers/RegistrationControllerTest.java
index 9ffe908c..017670ba 100644
--- a/service/src/test/java/org/whispersystems/textsecuregcm/controllers/RegistrationControllerTest.java
+++ b/service/src/test/java/org/whispersystems/textsecuregcm/controllers/RegistrationControllerTest.java
@@ -526,10 +526,10 @@ class RegistrationControllerTest {
     }
 
     final AccountAttributes fetchesMessagesAccountAttributes =
-        new AccountAttributes(true, 1, 1, "test".getBytes(StandardCharsets.UTF_8), null, true, new Device.DeviceCapabilities(false, false, false, false));
+        new AccountAttributes(true, 1, 1, "test".getBytes(StandardCharsets.UTF_8), null, true, new Device.DeviceCapabilities(false, false, false, false, false));
 
     final AccountAttributes pushAccountAttributes =
-        new AccountAttributes(false, 1, 1, "test".getBytes(StandardCharsets.UTF_8), null, true, new Device.DeviceCapabilities(false, false, false, false));
+        new AccountAttributes(false, 1, 1, "test".getBytes(StandardCharsets.UTF_8), null, true, new Device.DeviceCapabilities(false, false, false, false, false));
 
     return Stream.of(
         // "Fetches messages" is true, but an APNs token is provided
@@ -615,7 +615,7 @@ class RegistrationControllerTest {
     }
 
     final AccountAttributes accountAttributes =
-        new AccountAttributes(true, 1, 1, "test".getBytes(StandardCharsets.UTF_8), null, true, new Device.DeviceCapabilities(false, false, false, false));
+        new AccountAttributes(true, 1, 1, "test".getBytes(StandardCharsets.UTF_8), null, true, new Device.DeviceCapabilities(false, false, false, false, false));
 
     return Stream.of(
         // Signed PNI EC pre-key is missing
@@ -785,13 +785,13 @@ class RegistrationControllerTest {
     final int registrationId = 1;
     final int pniRegistrationId = 2;
 
-    final Device.DeviceCapabilities deviceCapabilities = new Device.DeviceCapabilities(false, false, false, false);
+    final Device.DeviceCapabilities deviceCapabilities = new Device.DeviceCapabilities(false, false, false, false, false);
 
     final AccountAttributes fetchesMessagesAccountAttributes =
-        new AccountAttributes(true, registrationId, pniRegistrationId, "test".getBytes(StandardCharsets.UTF_8), null, true, new Device.DeviceCapabilities(false, false, false, false));
+        new AccountAttributes(true, registrationId, pniRegistrationId, "test".getBytes(StandardCharsets.UTF_8), null, true, new Device.DeviceCapabilities(false, false, false, false, false));
 
     final AccountAttributes pushAccountAttributes =
-        new AccountAttributes(false, registrationId, pniRegistrationId, "test".getBytes(StandardCharsets.UTF_8), null, true, new Device.DeviceCapabilities(false, false, false, false));
+        new AccountAttributes(false, registrationId, pniRegistrationId, "test".getBytes(StandardCharsets.UTF_8), null, true, new Device.DeviceCapabilities(false, false, false, false, false));
 
     final String apnsToken = "apns-token";
     final String apnsVoipToken = "apns-voip-token";
@@ -906,7 +906,7 @@ class RegistrationControllerTest {
     final IdentityKey pniIdentityKey = new IdentityKey(pniIdentityKeyPair.getPublicKey());
 
     final AccountAttributes accountAttributes = new AccountAttributes(true, registrationId, pniRegistrationId, "name".getBytes(StandardCharsets.UTF_8), "reglock",
-            true, new Device.DeviceCapabilities(true, true, true, false));
+            true, new Device.DeviceCapabilities(true, true, true, false, false));
 
     final RegistrationRequest request = new RegistrationRequest(
         Base64.getEncoder().encodeToString(sessionId.getBytes(StandardCharsets.UTF_8)),
diff --git a/service/src/test/java/org/whispersystems/textsecuregcm/grpc/DevicesGrpcServiceTest.java b/service/src/test/java/org/whispersystems/textsecuregcm/grpc/DevicesGrpcServiceTest.java
index a5968aa3..9c12b133 100644
--- a/service/src/test/java/org/whispersystems/textsecuregcm/grpc/DevicesGrpcServiceTest.java
+++ b/service/src/test/java/org/whispersystems/textsecuregcm/grpc/DevicesGrpcServiceTest.java
@@ -395,7 +395,8 @@ class DevicesGrpcServiceTest extends SimpleBaseGrpcTest<DevicesGrpcService, Devi
       @CartesianTest.Values(booleans = {true, false}) final boolean storage,
       @CartesianTest.Values(booleans = {true, false}) final boolean transfer,
       @CartesianTest.Values(booleans = {true, false}) final boolean paymentActivation,
-      @CartesianTest.Values(booleans = {true, false}) final boolean deleteSync) {
+      @CartesianTest.Values(booleans = {true, false}) final boolean deleteSync,
+      @CartesianTest.Values(booleans = {true, false}) final boolean versionedExpirationTimer) {
 
     mockAuthenticationInterceptor().setAuthenticatedDevice(AUTHENTICATED_ACI, deviceId);
 
@@ -407,13 +408,15 @@ class DevicesGrpcServiceTest extends SimpleBaseGrpcTest<DevicesGrpcService, Devi
             .setTransfer(transfer)
             .setPaymentActivation(paymentActivation)
             .setDeleteSync(deleteSync)
+            .setVersionedExpirationTimer(versionedExpirationTimer)
         .build());
 
     final Device.DeviceCapabilities expectedCapabilities = new Device.DeviceCapabilities(
         storage,
         transfer,
         paymentActivation,
-        deleteSync);
+        deleteSync,
+        versionedExpirationTimer);
 
     verify(device).setCapabilities(expectedCapabilities);
   }
diff --git a/service/src/test/java/org/whispersystems/textsecuregcm/storage/AccountCreationDeletionIntegrationTest.java b/service/src/test/java/org/whispersystems/textsecuregcm/storage/AccountCreationDeletionIntegrationTest.java
index 15ea19d6..0312b8d9 100644
--- a/service/src/test/java/org/whispersystems/textsecuregcm/storage/AccountCreationDeletionIntegrationTest.java
+++ b/service/src/test/java/org/whispersystems/textsecuregcm/storage/AccountCreationDeletionIntegrationTest.java
@@ -187,6 +187,7 @@ public class AccountCreationDeletionIntegrationTest {
         ThreadLocalRandom.current().nextBoolean(),
         ThreadLocalRandom.current().nextBoolean(),
         ThreadLocalRandom.current().nextBoolean(),
+        ThreadLocalRandom.current().nextBoolean(),
         ThreadLocalRandom.current().nextBoolean());
 
     final AccountAttributes accountAttributes = new AccountAttributes(deliveryChannels.fetchesMessages(),
@@ -297,14 +298,15 @@ public class AccountCreationDeletionIntegrationTest {
       final KEMSignedPreKey pniPqLastResortPreKey = KeysHelper.signedKEMPreKey(4, pniKeyPair);
 
       final Account originalAccount = accountsManager.create(number,
-          new AccountAttributes(true, 1, 1, "name".getBytes(StandardCharsets.UTF_8), "registration-lock", false, new Device.DeviceCapabilities(false, false, false, false)),
+          new AccountAttributes(true, 1, 1, "name".getBytes(StandardCharsets.UTF_8), "registration-lock", false,
+              new Device.DeviceCapabilities(false, false, false, false, false)),
           Collections.emptyList(),
           new IdentityKey(aciKeyPair.getPublicKey()),
           new IdentityKey(pniKeyPair.getPublicKey()),
           new DeviceSpec(null,
               "password?",
               "OWI",
-              new Device.DeviceCapabilities(false, false, false, false),
+              new Device.DeviceCapabilities(false, false, false, false, false),
               1,
               2,
               true,
@@ -329,6 +331,7 @@ public class AccountCreationDeletionIntegrationTest {
         ThreadLocalRandom.current().nextBoolean(),
         ThreadLocalRandom.current().nextBoolean(),
         ThreadLocalRandom.current().nextBoolean(),
+        ThreadLocalRandom.current().nextBoolean(),
         ThreadLocalRandom.current().nextBoolean());
 
     final AccountAttributes accountAttributes = new AccountAttributes(deliveryChannels.fetchesMessages(),
@@ -419,6 +422,7 @@ public class AccountCreationDeletionIntegrationTest {
         ThreadLocalRandom.current().nextBoolean(),
         ThreadLocalRandom.current().nextBoolean(),
         ThreadLocalRandom.current().nextBoolean(),
+        ThreadLocalRandom.current().nextBoolean(),
         ThreadLocalRandom.current().nextBoolean());
 
     final AccountAttributes accountAttributes = new AccountAttributes(true,
diff --git a/service/src/test/java/org/whispersystems/textsecuregcm/storage/AccountTest.java b/service/src/test/java/org/whispersystems/textsecuregcm/storage/AccountTest.java
index 2f872bfc..22d77ff6 100644
--- a/service/src/test/java/org/whispersystems/textsecuregcm/storage/AccountTest.java
+++ b/service/src/test/java/org/whispersystems/textsecuregcm/storage/AccountTest.java
@@ -46,6 +46,8 @@ class AccountTest {
   private final Device paymentActivationIncapableDeviceWithoutDeliveryChannel = mock(Device.class);
   private final Device deleteSyncCapableDevice = mock(Device.class);
   private final Device deleteSyncIncapableDevice = mock(Device.class);
+  private final Device versionedExpirationTimerCapableDevice = mock(Device.class);
+  private final Device versionedExpirationTimerIncapableDevice = mock(Device.class);
 
   @BeforeEach
   void setup() {
@@ -66,19 +68,27 @@ class AccountTest {
     when(oldSecondaryDevice.getId()).thenReturn(deviceId2);
 
     when(paymentActivationCapableDevice.getCapabilities())
-        .thenReturn(new DeviceCapabilities(true, true, true, false));
+        .thenReturn(new DeviceCapabilities(true, true, true, false, false));
 
     when(paymentActivationIncapableDevice.getCapabilities())
-        .thenReturn(new DeviceCapabilities(true, true, false, false));
+        .thenReturn(new DeviceCapabilities(true, true, false, false, false));
 
     when(paymentActivationIncapableDeviceWithoutDeliveryChannel.getCapabilities())
-        .thenReturn(new DeviceCapabilities(true, true, false, false));
+        .thenReturn(new DeviceCapabilities(true, true, false, false, false));
 
     when(deleteSyncCapableDevice.getCapabilities())
-        .thenReturn(new DeviceCapabilities(true, true, true, true));
+        .thenReturn(new DeviceCapabilities(true, true, true, true, false));
 
     when(deleteSyncIncapableDevice.getCapabilities())
-        .thenReturn(new DeviceCapabilities(true, true, true, false));
+        .thenReturn(new DeviceCapabilities(true, true, true, false, false));
+
+    when(versionedExpirationTimerCapableDevice.getId()).thenReturn((byte) 1);
+    when(versionedExpirationTimerCapableDevice.getCapabilities())
+        .thenReturn(new DeviceCapabilities(true, true, true, false, true));
+
+    when(versionedExpirationTimerIncapableDevice.getId()).thenReturn((byte) 2);
+    when(versionedExpirationTimerIncapableDevice.getCapabilities())
+        .thenReturn(new DeviceCapabilities(true, true, true, false, false));
 
   }
 
@@ -165,6 +175,16 @@ class AccountTest {
         "1234".getBytes(StandardCharsets.UTF_8)).isDeleteSyncSupported());
   }
 
+  @Test
+  void isVersionedExpirationTimerSupported() {
+    assertTrue(AccountsHelper.generateTestAccount("+18005551234", UUID.randomUUID(), UUID.randomUUID(),
+        List.of(versionedExpirationTimerCapableDevice),
+        "1234".getBytes(StandardCharsets.UTF_8)).isVersionedExpirationTimerSupported());
+    assertFalse(AccountsHelper.generateTestAccount("+18005551234", UUID.randomUUID(), UUID.randomUUID(),
+        List.of(versionedExpirationTimerIncapableDevice, versionedExpirationTimerCapableDevice),
+        "1234".getBytes(StandardCharsets.UTF_8)).isVersionedExpirationTimerSupported());
+  }
+
   @Test
   void stale() {
     final Account account = AccountsHelper.generateTestAccount("+14151234567", UUID.randomUUID(), UUID.randomUUID(), Collections.emptyList(),
diff --git a/service/src/test/java/org/whispersystems/textsecuregcm/storage/AccountsManagerChangeNumberIntegrationTest.java b/service/src/test/java/org/whispersystems/textsecuregcm/storage/AccountsManagerChangeNumberIntegrationTest.java
index 400f8a35..e9b81dc4 100644
--- a/service/src/test/java/org/whispersystems/textsecuregcm/storage/AccountsManagerChangeNumberIntegrationTest.java
+++ b/service/src/test/java/org/whispersystems/textsecuregcm/storage/AccountsManagerChangeNumberIntegrationTest.java
@@ -193,7 +193,7 @@ class AccountsManagerChangeNumberIntegrationTest {
     final int rotatedPniRegistrationId = 17;
     final ECKeyPair rotatedPniIdentityKeyPair = Curve.generateKeyPair();
     final ECSignedPreKey rotatedSignedPreKey = KeysHelper.signedECPreKey(1L, rotatedPniIdentityKeyPair);
-    final AccountAttributes accountAttributes = new AccountAttributes(true, rotatedPniRegistrationId + 1, rotatedPniRegistrationId, "test".getBytes(StandardCharsets.UTF_8), null, true, new Device.DeviceCapabilities(false, false, false, false));
+    final AccountAttributes accountAttributes = new AccountAttributes(true, rotatedPniRegistrationId + 1, rotatedPniRegistrationId, "test".getBytes(StandardCharsets.UTF_8), null, true, new Device.DeviceCapabilities(false, false, false, false, false));
     final Account account = AccountsHelper.createAccount(accountsManager, originalNumber, accountAttributes);
 
     keysManager.storeEcSignedPreKeys(account.getIdentifier(IdentityType.ACI),
diff --git a/service/src/test/java/org/whispersystems/textsecuregcm/storage/AccountsManagerConcurrentModificationIntegrationTest.java b/service/src/test/java/org/whispersystems/textsecuregcm/storage/AccountsManagerConcurrentModificationIntegrationTest.java
index 0d3d5631..92615298 100644
--- a/service/src/test/java/org/whispersystems/textsecuregcm/storage/AccountsManagerConcurrentModificationIntegrationTest.java
+++ b/service/src/test/java/org/whispersystems/textsecuregcm/storage/AccountsManagerConcurrentModificationIntegrationTest.java
@@ -156,7 +156,7 @@ class AccountsManagerConcurrentModificationIntegrationTest {
                   null,
                   "password",
                   null,
-                  new Device.DeviceCapabilities(false, false, false, false),
+                  new Device.DeviceCapabilities(false, false, false, false, false),
                   1,
                   2,
                   true,
diff --git a/service/src/test/java/org/whispersystems/textsecuregcm/storage/AccountsManagerTest.java b/service/src/test/java/org/whispersystems/textsecuregcm/storage/AccountsManagerTest.java
index 46948092..b456273b 100644
--- a/service/src/test/java/org/whispersystems/textsecuregcm/storage/AccountsManagerTest.java
+++ b/service/src/test/java/org/whispersystems/textsecuregcm/storage/AccountsManagerTest.java
@@ -876,7 +876,7 @@ class AccountsManagerTest {
   @ValueSource(booleans = {true, false})
   void testCreateWithStorageCapability(final boolean hasStorage) throws InterruptedException {
     final AccountAttributes attributes = new AccountAttributes(false, 1, 2, null, null,
-            true, new DeviceCapabilities(hasStorage, false, false, false));
+            true, new DeviceCapabilities(hasStorage, false, false, false, false));
 
     final Account account = createAccount("+18005550123", attributes);
 
@@ -901,7 +901,7 @@ class AccountsManagerTest {
     final byte[] deviceNameCiphertext = "device-name".getBytes(StandardCharsets.UTF_8);
     final String password = "password";
     final String signalAgent = "OWT";
-    final DeviceCapabilities deviceCapabilities = new DeviceCapabilities(true, true, true, false);
+    final DeviceCapabilities deviceCapabilities = new DeviceCapabilities(true, true, true, false, false);
     final int aciRegistrationId = 17;
     final int pniRegistrationId = 19;
     final ECSignedPreKey aciSignedPreKey = KeysHelper.signedECPreKey(1, aciKeyPair);
diff --git a/service/src/test/java/org/whispersystems/textsecuregcm/storage/AddRemoveDeviceIntegrationTest.java b/service/src/test/java/org/whispersystems/textsecuregcm/storage/AddRemoveDeviceIntegrationTest.java
index c24a38a3..6db9be43 100644
--- a/service/src/test/java/org/whispersystems/textsecuregcm/storage/AddRemoveDeviceIntegrationTest.java
+++ b/service/src/test/java/org/whispersystems/textsecuregcm/storage/AddRemoveDeviceIntegrationTest.java
@@ -172,7 +172,7 @@ public class AddRemoveDeviceIntegrationTest {
                 "device-name".getBytes(StandardCharsets.UTF_8),
                 "password",
                 "OWT",
-                new Device.DeviceCapabilities(true, true, true, false),
+                new Device.DeviceCapabilities(true, true, true, false, false),
                 1,
                 2,
                 true,
@@ -215,7 +215,7 @@ public class AddRemoveDeviceIntegrationTest {
                 "device-name".getBytes(StandardCharsets.UTF_8),
                 "password",
                 "OWT",
-                new Device.DeviceCapabilities(true, true, true, false),
+                new Device.DeviceCapabilities(true, true, true, false, false),
                 1,
                 2,
                 true,
@@ -268,7 +268,7 @@ public class AddRemoveDeviceIntegrationTest {
                 "device-name".getBytes(StandardCharsets.UTF_8),
                 "password",
                 "OWT",
-                new Device.DeviceCapabilities(true, true, true, false),
+                new Device.DeviceCapabilities(true, true, true, false, false),
                 1,
                 2,
                 true,
diff --git a/service/src/test/java/org/whispersystems/textsecuregcm/tests/util/AccountsHelper.java b/service/src/test/java/org/whispersystems/textsecuregcm/tests/util/AccountsHelper.java
index 42ccef8a..f273685a 100644
--- a/service/src/test/java/org/whispersystems/textsecuregcm/tests/util/AccountsHelper.java
+++ b/service/src/test/java/org/whispersystems/textsecuregcm/tests/util/AccountsHelper.java
@@ -149,6 +149,7 @@ public class AccountsHelper {
           case "getNextDeviceId" -> when(updatedAccount.getNextDeviceId()).thenAnswer(stubbing);
           case "isPaymentActivationSupported" -> when(updatedAccount.isPaymentActivationSupported()).thenAnswer(stubbing);
           case "isDeleteSyncSupported" -> when(updatedAccount.isDeleteSyncSupported()).thenAnswer(stubbing);
+          case "isVersionedExpirationTimerSupported" -> when(updatedAccount.isVersionedExpirationTimerSupported()).thenAnswer(stubbing);
           case "getRegistrationLock" -> when(updatedAccount.getRegistrationLock()).thenAnswer(stubbing);
           case "getIdentityKey" ->
               when(updatedAccount.getIdentityKey(stubbing.getInvocation().getArgument(0))).thenAnswer(stubbing);