We have an RDS server (2016). Since November or October, every cumulative update (well until Jan, haven't applied latest yet), breaks RDP. We can connect to the gateway fine, but accessing the RD desktop just fails with a warning about not being able to connect. If I uninstall the Cumulative update, then all works again.
Event log shows hundreds of Schannel events (A fatal error occurred while creating a TLS client credential. The internal error state is 10013.) The remote desktop management service fails to start and the server manager shows this issue:
the server pool does not match the rd connection broker that are in it. errors
Any ideas on how to fix?