RDS 2012 R2 with UPD, 1 broker, 1 gateway and 2 session hosts. All users are experiencing at least 5 min login times, both when using remoteapp and an admin logins in to a session host using RDC. Here is what I am seeing in Microsoft-Windows-TerminalServices-SessionBroker-Client/Operational:
Remote Desktop Connection Broker Client failed to redirect the user SH01\admin name.
Error: No mapping between account names and security IDs was done.
Quick google search seems to suggest this has to do with a computer object in AD. This worked for about a week. In hopes of fixing, I did all windows updates and rebooted both session hosts. Same result. The only GPO is the specify default URL GPO and I have disable it for now.