Jul 07 2017 01:33 AM
I guess we speak about about My Workspace at Power BI services. I could be wrong, but transfer of ownerships is still not implemented, as well as transfer of dashboards and reports from one workspace to another.
In general better not to use My Workspace at all to avoid such problems, but that's another story.
Sorry, nothing useful, just a comment. We had no such experience in our organization.