diff --git a/apps/dav/lib/Connector/Sabre/FilesPlugin.php b/apps/dav/lib/Connector/Sabre/FilesPlugin.php
index 040a6a035fceb..c0e4bf7fb1be2 100644
--- a/apps/dav/lib/Connector/Sabre/FilesPlugin.php
+++ b/apps/dav/lib/Connector/Sabre/FilesPlugin.php
@@ -412,6 +412,11 @@ public function handleGetProperties(PropFind $propFind, \Sabre\DAV\INode $node)
 			$propFind->handle(self::DISPLAYNAME_PROPERTYNAME, function () use ($node) {
 				return $node->getName();
 			});
+
+			$propFind->handle(self::IS_FEDERATED_PROPERTYNAME, function () use ($node) {
+				return $node->getFileInfo()->getMountPoint()
+					instanceof \OCA\Files_Sharing\External\Mount;
+			});
 		}
 
 		if ($node instanceof \OCA\DAV\Connector\Sabre\File) {
diff --git a/apps/files/src/init.ts b/apps/files/src/init.ts
index db4aec7fa0633..c12d4f193f33f 100644
--- a/apps/files/src/init.ts
+++ b/apps/files/src/init.ts
@@ -66,5 +66,6 @@ registerPreviewServiceWorker()
 
 registerDavProperty('nc:hidden', { nc: 'http://nextcloud.org/ns' })
 registerDavProperty('nc:is-mount-root', { nc: 'http://nextcloud.org/ns' })
+registerDavProperty('nc:is-federated', { nc: 'http://nextcloud.org/ns' })
 
 initLivePhotos()
diff --git a/apps/files_sharing/src/actions/sharingStatusAction.ts b/apps/files_sharing/src/actions/sharingStatusAction.ts
index 635e9e0d572dd..fc155985eee5f 100644
--- a/apps/files_sharing/src/actions/sharingStatusAction.ts
+++ b/apps/files_sharing/src/actions/sharingStatusAction.ts
@@ -18,7 +18,7 @@ import { generateAvatarSvg } from '../utils/AccountIcon'
 import './sharingStatusAction.scss'
 
 const isExternal = (node: Node) => {
-	return node.attributes.remote_id !== undefined
+	return node.attributes?.['is-federated'] ?? false
 }
 
 export const action = new FileAction({