diff --git a/apps/dav/lib/CalDAV/RetentionService.php b/apps/dav/lib/CalDAV/RetentionService.php
index 934e6f7153..7342b719c8 100644
--- a/apps/dav/lib/CalDAV/RetentionService.php
+++ b/apps/dav/lib/CalDAV/RetentionService.php
@@ -51,8 +51,8 @@ class RetentionService {
 		$this->calDavBackend = $calDavBackend;
 	}
 
-	public function cleanUp(): void {
-		$retentionTime = max(
+	public function getDuration(): int {
+		return max(
 			(int) $this->config->getAppValue(
 				Application::APP_ID,
 				self::RETENTION_CONFIG_KEY,
@@ -60,6 +60,10 @@ class RetentionService {
 			),
 			0 // Just making sure we don't delete things in the future when a negative number is passed
 		);
+	}
+
+	public function cleanUp(): void {
+		$retentionTime = $this->getDuration();
 		$now = $this->time->getTime();
 
 		$calendars = $this->calDavBackend->getDeletedCalendars($now - $retentionTime);
diff --git a/apps/dav/lib/CalDAV/Trashbin/Plugin.php b/apps/dav/lib/CalDAV/Trashbin/Plugin.php
index fd47e1faa3..93f17cc5b7 100644
--- a/apps/dav/lib/CalDAV/Trashbin/Plugin.php
+++ b/apps/dav/lib/CalDAV/Trashbin/Plugin.php
@@ -27,6 +27,7 @@ namespace OCA\DAV\CalDAV\Trashbin;
 
 use Closure;
 use OCA\DAV\CalDAV\Calendar;
+use OCA\DAV\CalDAV\RetentionService;
 use OCP\IRequest;
 use Sabre\DAV\Exception\NotFound;
 use Sabre\DAV\INode;
@@ -41,15 +42,21 @@ use function implode;
 class Plugin extends ServerPlugin {
 	public const PROPERTY_DELETED_AT = '{http://nextcloud.com/ns}deleted-at';
 	public const PROPERTY_CALENDAR_URI = '{http://nextcloud.com/ns}calendar-uri';
+	public const PROPERTY_RETENTION_DURATION = '{http://nextcloud.com/ns}trash-bin-retention-duration';
 
 	/** @var bool */
 	private $disableTrashbin;
 
+	/** @var RetentionService */
+	private $retentionService;
+
 	/** @var Server */
 	private $server;
 
-	public function __construct(IRequest $request) {
+	public function __construct(IRequest $request,
+								RetentionService $retentionService) {
 		$this->disableTrashbin = $request->getHeader('X-NC-CalDAV-No-Trashbin') === '1';
+		$this->retentionService = $retentionService;
 	}
 
 	public function initialize(Server $server): void {
@@ -100,6 +107,11 @@ class Plugin extends ServerPlugin {
 				return $node->getCalendarUri();
 			});
 		}
+		if ($node instanceof TrashbinHome) {
+			$propFind->handle(self::PROPERTY_RETENTION_DURATION, function () use ($node) {
+				return $this->retentionService->getDuration();
+			});
+		}
 	}
 
 	public function getFeatures(): array {
diff --git a/apps/dav/lib/Server.php b/apps/dav/lib/Server.php
index 0999da3dbe..50c6438018 100644
--- a/apps/dav/lib/Server.php
+++ b/apps/dav/lib/Server.php
@@ -165,7 +165,7 @@ class Server {
 				$this->server->addPlugin(\OC::$server->query(\OCA\DAV\CalDAV\Schedule\IMipPlugin::class));
 			}
 
-			$this->server->addPlugin(new \OCA\DAV\CalDAV\Trashbin\Plugin($request));
+			$this->server->addPlugin(\OC::$server->get(\OCA\DAV\CalDAV\Trashbin\Plugin::class));
 			$this->server->addPlugin(new \OCA\DAV\CalDAV\WebcalCaching\Plugin($request));
 			$this->server->addPlugin(new \Sabre\CalDAV\Subscriptions\Plugin());