In resource updating manager, workstation move to the target domain fails with "Credentials are not specified for target domain" error.
In RUM, go to Project | Manage Domains Credentials and add target domain FQDN and NETBios name together with a corresponding account that has rights to join computers to target domain, then attempt the move again.
In the latest version of RUM, it is possible to set credentials at the collection level. To ensure the credentials supplied are used for all collections make sure the root is highlight, and not a collection, when entering in the the FQDN and NETBios names and credentials.