diff --git a/lib/Federation/CloudFederationProviderTalk.php b/lib/Federation/CloudFederationProviderTalk.php
index 43552b3497d..2788300a01d 100644
--- a/lib/Federation/CloudFederationProviderTalk.php
+++ b/lib/Federation/CloudFederationProviderTalk.php
@@ -415,6 +415,10 @@ private function messagePosted(int $remoteAttendeeId, array $notification): arra
 			return [];
 		}
 
+		$this->logger->debug('Setting unread info for local federated user ' . $invite->getUserId() . ' in ' . $room->getToken() . ' to ' . json_encode($notification['unreadInfo']), [
+			'app' => 'spreed-federation',
+		]);
+
 		$this->participantService->updateUnreadInfoForProxyParticipant(
 			$participant,
 			$notification['unreadInfo']['unreadMessages'],
diff --git a/tests/integration/features/bootstrap/FeatureContext.php b/tests/integration/features/bootstrap/FeatureContext.php
index afc431ed9bd..00018426ba2 100644
--- a/tests/integration/features/bootstrap/FeatureContext.php
+++ b/tests/integration/features/bootstrap/FeatureContext.php
@@ -460,6 +460,9 @@ private function assertRooms($rooms, TableNode $formData, bool $shouldOrder = fa
 			if (isset($expectedRoom['lastMessage'])) {
 				$data['lastMessage'] = $room['lastMessage'] ? $room['lastMessage']['message'] : '';
 			}
+			if (isset($expectedRoom['lastReadMessage'])) {
+				$data['lastReadMessage'] = self::$messageIdToText[(int) $room['lastReadMessage']] ?? (!$room['lastReadMessage'] ? 'ZERO': 'UNKNOWN_MESSAGE');
+			}
 			if (isset($expectedRoom['unreadMessages'])) {
 				$data['unreadMessages'] = (int) $room['unreadMessages'];
 			}
diff --git a/tests/integration/features/federation/chat.feature b/tests/integration/features/federation/chat.feature
index d600b7e0437..b56078ce27a 100644
--- a/tests/integration/features/federation/chat.feature
+++ b/tests/integration/features/federation/chat.feature
@@ -147,26 +147,26 @@ Feature: federation/chat
       | id   | name | type | remoteServer | remoteToken |
       | room | room | 2    | LOCAL        | room        |
     Then user "participant2" is participant of the following rooms (v4)
-      | id   | type | unreadMessages | unreadMention | unreadMentionDirect |
-      | room | 2    | 0              | 0             | 0                   |
+      | id   | type | lastReadMessage      | unreadMessages | unreadMention | unreadMentionDirect |
+      | room | 2    | UNKNOWN_MESSAGE      | 0              | 0             | 0                   |
     And user "participant1" sends message "Message 1" to room "room" with 201
     And user "participant1" sends message "Message 2" to room "room" with 201
     When user "participant2" marks room "LOCAL::room" as unread with 200 (v1)
     Then user "participant2" is participant of the following rooms (v4)
-      | id   | type | unreadMessages | unreadMention | unreadMentionDirect |
-      | room | 2    | 1              | 0             | 0                   |
+      | id   | type | lastReadMessage      | unreadMessages | unreadMention | unreadMentionDirect |
+      | room | 2    | Message 1            | 1              | 0             | 0                   |
     When user "participant2" reads message "NULL" in room "LOCAL::room" with 200 (v1)
     Then user "participant2" is participant of the following rooms (v4)
-      | id   | type | unreadMessages | unreadMention | unreadMentionDirect |
-      | room | 2    | 0              | 0             | 0                   |
+      | id   | type | lastReadMessage      | unreadMessages | unreadMention | unreadMentionDirect |
+      | room | 2    | Message 2            | 0              | 0             | 0                   |
     When user "participant2" reads message "Message 1" in room "LOCAL::room" with 200 (v1)
     Then user "participant2" is participant of the following rooms (v4)
-      | id   | type | unreadMessages | unreadMention | unreadMentionDirect |
-      | room | 2    | 1              | 0             | 0                   |
+      | id   | type | lastReadMessage      | unreadMessages | unreadMention | unreadMentionDirect |
+      | room | 2    | Message 1            | 1              | 0             | 0                   |
     When user "participant2" reads message "Message 2" in room "LOCAL::room" with 200 (v1)
     Then user "participant2" is participant of the following rooms (v4)
-      | id   | type | unreadMessages | unreadMention | unreadMentionDirect |
-      | room | 2    | 0              | 0             | 0                   |
+      | id   | type | lastReadMessage      | unreadMessages | unreadMention | unreadMentionDirect |
+      | room | 2    | Message 2            | 0              | 0             | 0                   |
 
   Scenario: Error handling of chatting (posting a too long message)
     Given the following "spreed" app config is set