We have a Windows Server 2008R2 Active Directory domain. Workstations on our network are both domain joined and non domain joined. We have a domain joined print server\\printserver1 (Windows Server 2008 R2) with some shared printers. We are noticing that if a domain user on a non domain joined machine maps/connects (using their domain credentials) to a shared printer on\\printserver1 they would print fine but after a while the printer port on the printer changes from standard tcp/ip to remote print port. I cannot edit or configure this port, keep getting a print server error. The workaround is the delete the entire printer from the workstation and reconnect to it. This is not isolated to any specific printer but is isolated to the non domain joined workstations.
Any advice on this problem would be appreciated. thanks.