I've set up a single Server 2012 R2 Gateway/Session/RDWeb server. At some point during setup, the WebFeed stopped working and I can no longer connect using the RemoteApp and Desktop Connections control panel or the Remote Resources connection in the Mac RDC client.
Trying to connect to https://domainname.com/RDWeb/Feed/webfeed.aspx receives an Error code: "0x80040205, 0x1F4" on Windows connections and nothing on the Mac except an empty Remote Resources list.
Looking at the inetpub logs, the following events are recorded during the connection attempt:
#Software: Microsoft Internet Information Services 8.5
#Version: 1.0
#Date: 2016-03-28 15:35:38
#Fields: date time s-ip cs-method cs-uri-stem cs-uri-query s-port cs-username c-ip cs(User-Agent) cs(Referer) sc-status sc-substatus sc-win32-status time-taken
2016-03-28 15:35:38 172.xxx.xxx.xxx GET /RDWeb/Feed/webfeed.aspx - 443 - 50.xxx.xxx.xxx TSWorkspace/2.0 - 302 0 0 155
2016-03-28 15:35:38 172.xxx.xxx.xxx GET /RDWeb/FeedLogin/WebFeedlogin.aspx ReturnUrl=%2fRDWeb%2fFeed%2fwebfeed.aspx 443 - 50.xxx.xxx.xxx TSWorkspace/2.0 - 401 2 5 144
2016-03-28 15:35:38 172.xxx.xxx.xxx GET /RDWeb/FeedLogin/WebFeedlogin.aspx ReturnUrl=%2fRDWeb%2fFeed%2fwebfeed.aspx 443 - 50.xxx.xxx.xxx TSWorkspace/2.0 - 401 2 5 12
2016-03-28 15:35:50 172.xxx.xxx.xxx GET /RDWeb/FeedLogin/WebFeedlogin.aspx ReturnUrl=%2fRDWeb%2fFeed%2fwebfeed.aspx 443 domain\username 50.xxx.xxx.xxx TSWorkspace/2.0 - 200 0 0 105
2016-03-28 15:35:50 172.xxx.xxx.xxx GET /RDWeb/Feed/webfeed.aspx - 443 - 50.xxx.xxx.xxx TSWorkspace/2.0 - 500 0 0 188
The 401 entries lead me to believe authentication is being denied somewhere for some reason, but I haven't been able to figure out where.
Looking at the server's Security log, I see the logon attempt followed immediately by a logoff notification. I see the logon attempt is using NTLM:
Detailed Authentication Information:
Logon Process: NtLmSsp
Authentication Package: NTLM
Transited Services: -
Package Name (NTLM only): NTLM V2
Key Length: 128
Any help is appreciated.