The remote computer that you are trying to connect to requires Network Level Authentication (NLA), but your Windows domain controller cannot be contacted to perform NLA.

Solution: 1. Open registry editor In the search box or Run window, type the following, followed by Enter:   regedit 2. Navigate or browse to the following key: HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\Control\Terminal Server 3. Locate the fDenyTSConnections subkey, […]