RDP client Remmina stopped connecting to remote clients from one day to the next. One possible change on the remote client was more strict incoming connection settings set with group policy on the domain they are part of. The fix to this problem was to:
- Delete the line with the remote client info from the file:
~.freerdp
- Change the connection settings to:
Edit session settings --> Advanced --> Security = NLA
- Connect to remote client and accept new key