Hi,
After doing lot of research and reading lot of discussions, still i am not able to fix this issue.
https://social.technet.microsoft.com/Forums/windowsserver/en-US/0e340938-309c-415f-997c-5ca3d3051160/rdweb-getting-remote-desktop-gateway-server-is-temporarily-unavailable-error?forum=winserverTS
https://social.technet.microsoft.com/Forums/windowsserver/en-US/c0020a23-f7f7-4b74-af6f-2152dc6c1255/terminal-services-gateway-server-is-temporarily-unavailable?forum=winserverTS
-Environment:Windows Server 2012 R2 (Remote Desktop Gateway, Session Server, Rdweb, Rd Licensing, Connection Borker, NPS -all in one).
-wild card SSL certificate with gateway SAN on it from Go-daddy.
-External RdWeb is accessible as internal Rdweb, internal rdweb is working for all remote apps but external Rdweb gives "Remote Desktop Gateway server is temporarily unavailable" error.
-Tried to use MSTSC internally to remote into local server through Remote Gateway Server, but same error.
- I am using port 8443 for RDweb (is that the problem?); I already mentioned 8443 port under Gateway Server Properties\Transport Settings\ IP : local Server & HTTPS Port: 8443
-NPS policies are configured by default.
-Gateway is already mentioned under rdweb/pages/application settings
-Default Website is only configured for one port that is 8443
-CAP & RAP are configured for domain users access. "manage local computer groups" has alreadyassigned to RAP with preferred group.
Can anybody please help: this error is a problem for most of the people who are configuring RDweb first time.
*************update**********
I got it working internally through Remote gateway server with rdp and rdweb, but externally still having the problem...