diff --git a/backend/app/dav/caldav.py b/backend/app/dav/caldav.py
index c6dcc78..824f52b 100644
--- a/backend/app/dav/caldav.py
+++ b/backend/app/dav/caldav.py
@@ -269,13 +269,24 @@ def propfind(subpath=''):
             multistatus.append(_principal_response(user))
         return _xml_response(multistatus)
 
-    # /dav/<username>/ : principal only (no child collections in this listing
-    # so clients don't mix calendars and addressbooks). Clients follow
-    # calendar-home-set / addressbook-home-set for the actual lists.
+    # /dav/<username>/ : principal itself + the two sub-containers as
+    # collection children (calendars/ and addressbooks/). The actual
+    # calendar/addressbook lists live under those home-sets.
     if len(parts) == 1:
         if parts[0] != user.username:
             return Response('', 403)
         multistatus.append(_principal_response(user))
+        if depth != '0':
+            for (sub, dn) in (('calendars', 'Kalender'), ('addressbooks', 'Adressbücher')):
+                container = ET.Element(_qn('d', 'response'))
+                ET.SubElement(container, _qn('d', 'href')).text = f'/dav/{user.username}/{sub}/'
+                propstat = ET.SubElement(container, _qn('d', 'propstat'))
+                prop = ET.SubElement(propstat, _qn('d', 'prop'))
+                rt = ET.SubElement(prop, _qn('d', 'resourcetype'))
+                ET.SubElement(rt, _qn('d', 'collection'))
+                ET.SubElement(prop, _qn('d', 'displayname')).text = dn
+                ET.SubElement(propstat, _qn('d', 'status')).text = 'HTTP/1.1 200 OK'
+                multistatus.append(container)
         return _xml_response(multistatus)
 
     # /dav/<username>/calendars/ : only calendar collections