In most cases when a domain login is used away from the domain controller, local authentication is done using cached credentials, and any attempt to search for network resources results in an attempt to access the domain controller, since this dictates which of the available resources may be used, and when the attempt fails, an error message is usually generated - are you using a VPN connection?
It may be possible to connect to and use the printer via the DNS-323, by installing the printer as a local printer and then modifying the properties - are you allowed to install a local printer (connected directly to the computer)?