Since installing the latest WU (Dec 2019) on both our Server 2012 R2 RDS Host and WIn10 LSTC client machines we can not anymore connect to our remote desktop server.
The client tries to connect, mulls for a while with the infamous "securing remote connexion" message and eventually throws up an error "This computer can't connect to the remote computer" (without any indication as of why).
Event log on both client and server don't show anything. Using MacOS client it fails after "detecting Network Quality" with error 0x7
It is possibéle to connect as an administrator to the console session (mstsc /admin) but not to a "normal" session, be it as an admin or user.
Although not 100% certain this seems very much to have started since the deployment of the latest windows updates.
Worth noting: we are connecting via direct internal LAN IP (not FQDN). If it is a certificate issue it might be relevant. Still, I would expect some sort of log showing the issue.
Any suggestion is most welcome!