diff --git a/apps/federatedfilesharing/lib/Notifier.php b/apps/federatedfilesharing/lib/Notifier.php
index f66482b1383e2..f072822870e80 100644
--- a/apps/federatedfilesharing/lib/Notifier.php
+++ b/apps/federatedfilesharing/lib/Notifier.php
@@ -102,15 +102,15 @@ public function prepare(INotification $notification, string $languageCode): INot
 
 				$params = $notification->getSubjectParameters();
 				if ($params[0] !== $params[1] && $params[1] !== null) {
+					$remoteInitiator = $this->createRemoteUser($params[0]);
+					$remoteOwner = $this->createRemoteUser($params[1]);
+					$params[3] = $remoteInitiator['name'] . '@' . $remoteInitiator['server'];
+					$params[4] = $remoteOwner['name'] . '@' . $remoteOwner['server'];
+
 					$notification->setParsedSubject(
 						$l->t('You received "%3$s" as a remote share from %4$s (%1$s) (on behalf of %5$s (%2$s))', $params)
 					);
 
-					$initiator = $params[0];
-					$initiatorDisplay = isset($params[3]) ? $params[3] : null;
-					$owner = $params[1];
-					$ownerDisplay = isset($params[4]) ? $params[4] : null;
-
 					$notification->setRichSubject(
 						$l->t('You received {share} as a remote share from {user} (on behalf of {behalf})'),
 						[
@@ -119,17 +119,18 @@ public function prepare(INotification $notification, string $languageCode): INot
 								'id' => $notification->getObjectId(),
 								'name' => $params[2],
 							],
-							'user' => $this->createRemoteUser($initiator, $initiatorDisplay),
-							'behalf' => $this->createRemoteUser($owner, $ownerDisplay),
+							'user' => $remoteInitiator,
+							'behalf' => $remoteOwner,
 						]
 					);
 				} else {
+					$remoteOwner = $this->createRemoteUser($params[0]);
+					$params[3] = $remoteOwner['name'] . '@' . $remoteOwner['server'];
+
 					$notification->setParsedSubject(
 						$l->t('You received "%3$s" as a remote share from %4$s (%1$s)', $params)
 					);
 
-					$owner = $params[0];
-					$ownerDisplay = isset($params[3]) ? $params[3] : null;
 
 					$notification->setRichSubject(
 						$l->t('You received {share} as a remote share from {user}'),
@@ -139,7 +140,7 @@ public function prepare(INotification $notification, string $languageCode): INot
 								'id' => $notification->getObjectId(),
 								'name' => $params[2],
 							],
-							'user' => $this->createRemoteUser($owner, $ownerDisplay),
+							'user' => $remoteOwner,
 						]
 					);
 				}
@@ -213,17 +214,24 @@ protected function getDisplayName(ICloudId $cloudId) {
 		}
 
 		try {
+			// contains protocol in the  ID
 			return $this->getDisplayNameFromContact($cloudId->getId());
 		} catch (\OutOfBoundsException $e) {
 		}
 
 		try {
-			$this->getDisplayNameFromContact($user . '@http://' . $server);
+			// does not include protocol, as stored in addressbooks
+			return $this->getDisplayNameFromContact($cloudId->getDisplayId());
+		} catch (\OutOfBoundsException $e) {
+		}
+
+		try {
+			return $this->getDisplayNameFromContact($user . '@http://' . $server);
 		} catch (\OutOfBoundsException $e) {
 		}
 
 		try {
-			$this->getDisplayNameFromContact($user . '@https://' . $server);
+			return $this->getDisplayNameFromContact($user . '@https://' . $server);
 		} catch (\OutOfBoundsException $e) {
 		}
 
diff --git a/apps/federatedfilesharing/lib/ocm/CloudFederationProviderFiles.php b/apps/federatedfilesharing/lib/ocm/CloudFederationProviderFiles.php
index e2e2f26ad3a83..5c5c9c46a0adb 100644
--- a/apps/federatedfilesharing/lib/ocm/CloudFederationProviderFiles.php
+++ b/apps/federatedfilesharing/lib/ocm/CloudFederationProviderFiles.php
@@ -256,7 +256,7 @@ public function shareReceived(ICloudFederationShare $share) {
 						->setAffectedUser($shareWith)
 						->setObject('remote_share', (int)$shareId, $name);
 					\OC::$server->getActivityManager()->publish($event);
-					$this->notifyAboutNewShare($shareWith, $shareId, $ownerFederatedId, $sharedByFederatedId, $name, $sharedBy, $owner);
+					$this->notifyAboutNewShare($shareWith, $shareId, $ownerFederatedId, $sharedByFederatedId, $name);
 				} else {
 					$groupMembers = $this->groupManager->get($shareWith)->getUsers();
 					foreach ($groupMembers as $user) {
@@ -267,7 +267,7 @@ public function shareReceived(ICloudFederationShare $share) {
 							->setAffectedUser($user->getUID())
 							->setObject('remote_share', (int)$shareId, $name);
 						\OC::$server->getActivityManager()->publish($event);
-						$this->notifyAboutNewShare($user->getUID(), $shareId, $ownerFederatedId, $sharedByFederatedId, $name, $sharedBy, $owner);
+						$this->notifyAboutNewShare($user->getUID(), $shareId, $ownerFederatedId, $sharedByFederatedId, $name);
 					}
 				}
 				return $shareId;
@@ -335,22 +335,13 @@ private function mapShareTypeToNextcloud($shareType) {
 		return $result;
 	}
 
-	/**
-	 * notify user about new federated share
-	 *
-	 * @param $shareWith
-	 * @param $shareId
-	 * @param $ownerFederatedId
-	 * @param $sharedByFederatedId
-	 * @param $name
-	 */
-	private function notifyAboutNewShare($shareWith, $shareId, $ownerFederatedId, $sharedByFederatedId, $name, $sharedBy, $owner) {
+	private function notifyAboutNewShare($shareWith, $shareId, $ownerFederatedId, $sharedByFederatedId, $name): void {
 		$notification = $this->notificationManager->createNotification();
 		$notification->setApp('files_sharing')
 			->setUser($shareWith)
 			->setDateTime(new \DateTime())
 			->setObject('remote_share', $shareId)
-			->setSubject('remote_share', [$ownerFederatedId, $sharedByFederatedId, trim($name, '/'), $sharedBy, $owner]);
+			->setSubject('remote_share', [$ownerFederatedId, $sharedByFederatedId, trim($name, '/')]);
 
 		$declineAction = $notification->createAction();
 		$declineAction->setLabel('decline')