MS CRM 2011 Beta - You have already imported and upgraded this organization and cannot perform this operation again.

This is new in MS CRM 2011.

You will receive the above error in MS CRM 2011 when you try to import an Organization of MS CRM 4.0.

This is because in CRM 2011, you cannot import the same CRM 4 org more than once into a CRM 2011 deployment. The Organization GUID will not change. This is by design.


Hope this helps.