Well, deletionion of the certificate and restarting rdp service did not help. thats what I am planning to try now - delete that rdp certificate if it allows me, but felt like asking before I do this. The error is due to a Microsoft Soft limit in the number of established connections for your server which is set by default to 2000.

by mismatched security levels between RDP client and server after Windows security updates.

well googling around with the 'internal error has occurred' I see recommendations to play with rdp certificates, either rename folder for all, or delete specific ones.(in comments) Remote Desktop Connection Internal Error has occurred.

It it is on ups, and its log does not make it seem like there was power issue, just that at that time communication started, meaning server booted up but there is no monitoring stopping so it was definitely unexpected. When connecting to RDP via NS gateway CVPN bookmarks, the RDP window terminates with error An Internal error has occurred. Check logs and on 9th may something went down at 2:00 AM.

first login I see notice that unexpected shutdown happened.

installed unatended anydesk for now, to keep way in and started to investigate.

Print Solution 1 : Verify Remote Desktop Connection Settings Solution 2 : Disabling Network Level. Testing both from windows and linux with rdesktop. How to Fix RDP error : An Internal Error has Occurred. Either I get connected or I get an internal error has occured.

needed to add new machine to the domain and rdp to server is hit or miss.

Simple windows server 2016 acting as PDC.

Rdp an internal error has occurred