diff --git a/vdirsyncer/storage/dav.py b/vdirsyncer/storage/dav.py
index 416841b..5383f12 100644
--- a/vdirsyncer/storage/dav.py
+++ b/vdirsyncer/storage/dav.py
@@ -226,6 +226,12 @@ class DavSession(object):
 class DavStorage(Storage):
 
     '''
+    .. note::
+
+        Please also see :ref:`server_support` for very important information,
+        as changing some of the default options might be very dangerous with
+        some servers.
+
     :param url: Base URL or an URL to a collection.
     :param username: Username for authentication.
     :param password: Password for authentication.