diff --git a/apps/dav/lib/Connector/Sabre/FilesPlugin.php b/apps/dav/lib/Connector/Sabre/FilesPlugin.php
index 4fed12e6569df..c2fe4dcb1a0fe 100644
--- a/apps/dav/lib/Connector/Sabre/FilesPlugin.php
+++ b/apps/dav/lib/Connector/Sabre/FilesPlugin.php
@@ -81,6 +81,7 @@ class FilesPlugin extends ServerPlugin {
 	public const MOUNT_TYPE_PROPERTYNAME = '{http://nextcloud.org/ns}mount-type';
 	public const MOUNT_ROOT_PROPERTYNAME = '{http://nextcloud.org/ns}is-mount-root';
 	public const IS_ENCRYPTED_PROPERTYNAME = '{http://nextcloud.org/ns}is-encrypted';
+	public const IS_FEDERATED_PROPERTYNAME = '{http://nextcloud.org/ns}is-federated';
 	public const METADATA_ETAG_PROPERTYNAME = '{http://nextcloud.org/ns}metadata_etag';
 	public const UPLOAD_TIME_PROPERTYNAME = '{http://nextcloud.org/ns}upload_time';
 	public const CREATION_TIME_PROPERTYNAME = '{http://nextcloud.org/ns}creation_time';
@@ -149,6 +150,7 @@ public function initialize(Server $server) {
 		$server->protectedProperties[] = self::HAS_PREVIEW_PROPERTYNAME;
 		$server->protectedProperties[] = self::MOUNT_TYPE_PROPERTYNAME;
 		$server->protectedProperties[] = self::IS_ENCRYPTED_PROPERTYNAME;
+		$server->protectedProperties[] = self::IS_FEDERATED_PROPERTYNAME;
 		$server->protectedProperties[] = self::SHARE_NOTE;
 
 		// normally these cannot be changed (RFC4918), but we want them modifiable through PROPPATCH
@@ -413,6 +415,11 @@ 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 c3b4b570e12ca..8816ffe81996d 100644
--- a/apps/files/src/init.ts
+++ b/apps/files/src/init.ts
@@ -70,5 +70,6 @@ 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 4f9648fa27f80..8dd1b40330490 100644
--- a/apps/files_sharing/src/actions/sharingStatusAction.ts
+++ b/apps/files_sharing/src/actions/sharingStatusAction.ts
@@ -29,25 +29,13 @@ import LinkSvg from '@mdi/svg/svg/link.svg?raw'
 import CircleSvg from '../../../../core/img/apps/circles.svg?raw'
 
 import { action as sidebarAction } from '../../../files/src/actions/sidebarAction'
-import { generateUrl } from '@nextcloud/router'
 import { getCurrentUser } from '@nextcloud/auth'
+import { generateAvatarSvg } from '../utils/AccountIcon.ts'
 
 import './sharingStatusAction.scss'
 
-const isDarkMode = window?.matchMedia?.('(prefers-color-scheme: dark)')?.matches === true
-	|| document.querySelector('[data-themes*=dark]') !== null
-
-const generateAvatarSvg = (userId: string, isGuest = false) => {
-	const url = isDarkMode ? '/avatar/{userId}/32/dark' : '/avatar/{userId}/32'
-	const avatarUrl = generateUrl(isGuest ? url : url + '?guestFallback=true', { userId })
-	return `<svg width="32" height="32" viewBox="0 0 32 32"
-		xmlns="http://www.w3.org/2000/svg" class="sharing-status__avatar">
-		<image href="${avatarUrl}" height="32" width="32" />
-	</svg>`
-}
-
 const isExternal = (node: Node) => {
-	return node.attributes.remote_id !== undefined
+	return node.attributes?.['is-federated'] ?? false
 }
 
 export const action = new FileAction({
@@ -110,7 +98,8 @@ export const action = new FileAction({
 
 		const ownerId = node?.attributes?.['owner-id']
 		if (ownerId && (ownerId !== getCurrentUser()?.uid || isExternal(node))) {
-			return generateAvatarSvg(ownerId, isExternal(node))
+			const sanitizeId = (id: string) => id.replace(/[^a-zA-Z0-9._%+@-]+/g, '').replace(/\//g, '')
+			return generateAvatarSvg(sanitizeId(ownerId), isExternal(node))
 		}
 
 		return AccountPlusSvg
diff --git a/apps/files_sharing/src/utils/AccountIcon.ts b/apps/files_sharing/src/utils/AccountIcon.ts
new file mode 100644
index 0000000000000..ccae8d50c8224
--- /dev/null
+++ b/apps/files_sharing/src/utils/AccountIcon.ts
@@ -0,0 +1,18 @@
+/*!
+ * SPDX-FileCopyrightText: 2024 Nextcloud GmbH and Nextcloud contributors
+ * SPDX-License-Identifier: AGPL-3.0-or-later
+ */
+import { generateUrl } from '@nextcloud/router'
+
+const isDarkMode = window?.matchMedia?.('(prefers-color-scheme: dark)')?.matches === true
+	|| document.querySelector('[data-themes*=dark]') !== null
+
+export const generateAvatarSvg = (userId: string, isExternalUser = false) => {
+	console.log('User ID:', userId)
+	const url = isDarkMode ? '/avatar/{userId}/32/dark' : '/avatar/{userId}/32'
+	const avatarUrl = generateUrl(isExternalUser ? url + '?guestFallback=true' : url, { userId })
+	return `<svg width="32" height="32" viewBox="0 0 32 32"
+		xmlns="http://www.w3.org/2000/svg" class="sharing-status__avatar">
+		<image href="${avatarUrl}" height="32" width="32" />
+	</svg>`
+}