ResponseFromTFS

If authorized:

HTTP/1.1 404 Not Found
Cache-Control: private
Content-Type: text/html; charset=utf-8
Server: Microsoft-IIS/8.5
X-TFS-ProcessId: 4e01732e-1319-41d8-b267-0c7a5950cdcb
X-FRAME-OPTIONS: SAMEORIGIN
Access-Control-Allow-Origin: *
Access-Control-Max-Age: 3600
Access-Control-Allow-Methods: OPTIONS,GET,POST,PATCH,PUT,DELETE
Access-Control-Expose-Headers: ActivityId,X-TFS-Session,X-MS-ContinuationToken
Access-Control-Allow-Headers: authorization
Set-Cookie: Tfs-SessionId=f794991e-7cde-483e-9185-6eaaf0c7d9d7; path=/
Set-Cookie: Tfs-SessionActive=2015-12-17T18:13:57; path=/
X-VSS-UserData: ab7ad484-8320-48f7-b63a-4c0b5c952704:xTerjeSa
X-AspNetMvc-Version: 4.0
X-AspNet-Version: 4.0.30319
X-TFS-ServiceError: Page+not+found.
Persistent-Auth: true
X-Powered-By: ASP.NET
P3P: CP="CAO DSP COR ADMa DEV CONo TELo CUR PSA PSD TAI IVDo OUR SAMi BUS DEM NAV STA UNI COM INT PHY ONL FIN PUR LOC CNT"
X-Content-Type-Options: nosniff
Date: Thu, 17 Dec 2015 18:13:57 GMT
Content-Length: 19265

If not authorized:

HTTP/1.1 401 Unauthorized
Cache-Control: private
Content-Type: text/html
Server: Microsoft-IIS/8.5
X-TFS-ProcessId: 4e01732e-1319-41d8-b267-0c7a5950cdcb
X-FRAME-OPTIONS: SAMEORIGIN
Access-Control-Allow-Origin: *
Access-Control-Max-Age: 3600
Access-Control-Allow-Methods: OPTIONS,GET,POST,PATCH,PUT,DELETE
Access-Control-Expose-Headers: ActivityId,X-TFS-Session,X-MS-ContinuationToken
Access-Control-Allow-Headers: authorization
Set-Cookie: Tfs-SessionId=0a0b8531-3686-4360-aaf6-deeece134d4e; path=/
Set-Cookie: Tfs-SessionActive=2015-12-17T18:38:01; path=/
WWW-Authenticate: NTLM
X-Powered-By: ASP.NET
P3P: CP="CAO DSP COR ADMa DEV CONo TELo CUR PSA PSD TAI IVDo OUR SAMi BUS DEM NAV STA UNI COM INT PHY ONL FIN PUR LOC CNT"
X-Content-Type-Options: nosniff
Date: Thu, 17 Dec 2015 18:38:01 GMT
Content-Length: 1293
Proxy-Support: Session-Based-Authentication