I have an HP server running Server 2012 as a DC (phyiscal) with an additional virtual Server 2012 running as a Terminal Server. The virtual Server claims at random that there are currently no logon servers available to service the logon request and denies all users access. I can however log on to the virtual Server via the Hyper V console as any user without issue and even take over any of the users sessions? The issue presents randomly without warning and can happen 2/3 times a day. A reboot of the Terminal Server however, fixes the problem until the next occurance. The error logs just show "This computer was not able to set up a secure session with a domain controller in domain **** due to the following: There are currently no logon servers available to service the logon request." I have already tried removing the Virtual Server from the Domain and re-adding it but to no avail. Any help would be greatly appreciated.