About two weeks ago a commenter mentioned that my Configuration Data Mover wasn't working with UK Dynamics 365 online organizations that had been created since the change to the orgname.crm11.dynamics.com URL structure. I've released a new version with an updated SDK reference that has resolved the issue.
If you are using an older version of the data mover and you are working with online orgs in a new region, you may want to go ahead and upgrade to the latest version here.