I have a Server 2012 R2 with all Remote Desktop roles and a number of Hyper-V VMs on it. This was all working fine until I replaced the (separate) domain controller. I had trouble with seeing the second domain controller (which is one of the VMs on the RDS server) and so I promoted the RDS box to a domain controller - I now know I shouldn't have.
The domain is now all sorted and I have removed the domain controller role from the RDS box. I can use RDS client to connect to any of the VMs. However if I try to use RDS client to connect to the RDS host, the connection fails and the RDS server's event log contains error 802 - Connection Broker failed to process the connection request for user ...... Error: Element not found.
In the Event Viewer, I have Custom Views / Server Roles /.../ Remote Desktop Services AND Remote Desktop Services1 (which contains the 802 error). Please can someone suggest a solution.