Running a Windows 2008 R2 server with DNS Server running. NIC on the server set to staic IP address with the DNS pointers going to 184.108.40.206 and 220.127.116.11 (Comcast).
Since converting workstations to Windows 10, they all lose their connection to mapped drives on the server. Every morning when accessing mapped drives we are prompted "The system cannot contact a domain controller to service the authentication request. Please try again later. On that same screen we enter our credentials and are connected to the mapped drives again (for the day).
This is not happening with workstations that are still Windows 7.
Suggestions please. What have I done wrong?