REPORT /egroupware/groupdav.php/principals/ HTTP/1.1
Host: ralfsmacbook.local
User-Agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10.7; rv:6.0.2) Gecko/20110902 Thunderbird/6.0.2 Lightning/1.0b5
Accept: text/xml
Accept-Language: de-de,de;q=0.8,en-us;q=0.5,en;q=0.3
Accept-Encoding: gzip, deflate
Accept-Charset: utf-8,*;q=0.1
Connection: keep-alive
Content-Length: 413
Content-Type: text/xml; charset=utf-8
Authorization: Basic cmFsZjpzZWNyZXQ=
Pragma: no-cache
Cache-Control: no-cache

<D:principal-property-search xmlns:D="DAV:" xmlns:C="urn:ietf:params:xml:ns:caldav">
  <D:property-search>
    <D:prop>
      <C:calendar-home-set/>
    </D:prop>
    <D:match>/egroupware/groupdav.php/birgit</D:match>
  </D:property-search>
  <D:prop>
    <C:calendar-home-set/>
    <C:calendar-user-address-set/>
    <C:schedule-inbox-URL/>
    <C:schedule-outbox-URL/>
  </D:prop>
</D:principal-property-search>
