If you are changing domains, you shouldn’t have to make any changes to your Quickmap installations unless you have stored Quickmap data server share names using the FQDN, assuming that all the user permissions remain the same.

For example, if you have shared the Quickmap data directory as \\ServerName.Domain\SharedFolder\ or are using a DFS share that includes the domain name in it’s title, then you will have to update the Quickmap clients with the new data directory path. If you have shared the Quickmap data directory as \\ServerName\SharedFolder\ then you shouldn’t have to do anything for the Quickmap clients to connect.