PROPFIND /principals/__uids__/admin/ HTTP/1.1
HTTP/1.1 401 Unauthorized

PROPFIND /principals/__uids__/admin/ HTTP/1.1
HTTP/1.1 207 Multi-Status

REPORT /principals/ HTTP/1.1
HTTP/1.1 200 OK

PROPFIND /calendars/__uids__/admin/ HTTP/1.1
HTTP/1.1 207 Multi-Status