REPORT /egroupware/groupdav.php/principals/ HTTP/1.1
Host: boulder.outdoor-training.de
Depth: 0
Authorization: Basic cmFsZjpzZWNyZXQ=
Content-Type: text/xml
Content-Length: 154
Connection: close

<?xml version="1.0" encoding="utf-8" ?>
<D:acl-principal-prop-set xmlns:D="DAV:">
  <D:prop>
    <D:displayname/>
  </D:prop>
</D:acl-principal-prop-set>
