PROPFIND /egroupware/groupdav.php/principals/users/ HTTP/1.1
Host: boulder.egroupware.org
Authorization: Basic cmFsZjpzZWNyZXQ=
Depth: 1
Content-Length: 165
Content-Type: application/xml

<?xml version="1.0" encoding="utf-8"?>
<propfind xmlns="DAV:">
 <prop>
  <C:calendar-user-address-set xmlns:C="urn:ietf:params:xml:ns:caldav"/>
 </prop>
</propfind>
