One common reason for this message is that the specified user or group does not exist. Ensure that the Windows user or group name exists and is accessible on the Windows data mover. If this is a domain user or group, the Windows data mover has to be part of that domain.

This message can also indicate that the Windows data mover is not able to access the active directory domain server. Ensure that network problems are not preventing the Windows data mover from communicating with the active directory domain server.