diff --git a/keyserver/src/keyserver.js b/keyserver/src/keyserver.js
--- a/keyserver/src/keyserver.js
+++ b/keyserver/src/keyserver.js
@@ -48,9 +48,10 @@
 } from './uploads/uploads.js';
 import { createAuthoritativeKeyserverConfigFiles } from './user/create-configs.js';
 import { fetchIdentityInfo } from './user/identity.js';
-import { verifyUserLoggedIn } from './user/login.js';
+import { authAndSaveIdentityInfo } from './user/login.js';
 import { initENSCache } from './utils/ens-cache.js';
 import { initFCCache } from './utils/fc-cache.js';
+import { syncPlatformDetails } from './utils/identity-utils.js';
 import { getContentSigningKey } from './utils/olm-utils.js';
 import {
   isPrimaryNode,
@@ -191,7 +192,15 @@
           // We await here to ensure that the keyserver has been provisioned a
           // commServicesAccessToken. In the future, this will be necessary for
           // many keyserver operations.
-          const identityInfo = await verifyUserLoggedIn();
+          let identityInfo = await fetchIdentityInfo();
+          if (identityInfo && isPrimaryNode) {
+            // We are using persisted auth metadata here, so we should attempt
+            // to synchronize platform details with the identity service
+            ignorePromiseRejections(syncPlatformDetails(identityInfo));
+          }
+          if (!identityInfo) {
+            identityInfo = await authAndSaveIdentityInfo();
+          }
 
           if (!isPrimaryNode) {
             return;
diff --git a/keyserver/src/user/login.js b/keyserver/src/user/login.js
--- a/keyserver/src/user/login.js
+++ b/keyserver/src/user/login.js
@@ -258,4 +258,8 @@
   }
 }
 
-export { verifyUserLoggedIn, verifyUserLoggedInWithoutDB };
+export {
+  verifyUserLoggedIn,
+  verifyUserLoggedInWithoutDB,
+  authAndSaveIdentityInfo,
+};
diff --git a/keyserver/src/utils/identity-utils.js b/keyserver/src/utils/identity-utils.js
--- a/keyserver/src/utils/identity-utils.js
+++ b/keyserver/src/utils/identity-utils.js
@@ -5,6 +5,7 @@
 import type { UserIdentitiesResponse } from 'lib/types/identity-service-types.js';
 
 import { getContentSigningKey } from './olm-utils.js';
+import type { IdentityInfo } from '../user/identity.js';
 import { verifyUserLoggedIn } from '../user/login.js';
 
 async function findUserIdentities(
@@ -23,4 +24,16 @@
   );
 }
 
-export { findUserIdentities };
+async function syncPlatformDetails(identityInfo: IdentityInfo): Promise<void> {
+  const [rustAPI, deviceID] = await Promise.all([
+    getRustAPI(),
+    getContentSigningKey(),
+  ]);
+  return rustAPI.syncPlatformDetails(
+    identityInfo.userId,
+    deviceID,
+    identityInfo.accessToken,
+  );
+}
+
+export { findUserIdentities, syncPlatformDetails };