I have just tried to upgrade an installation of SQL Server 2008 R2 Evaluation to a licensed copy of R2 Workgroup. When I go into the "Edition Upgrade" wizard and enter my product key the software informs me that:
"The SQL Server product key is not valid. To proceed, re-enter the product key values from the Certificate of Authenticity (COA) or SQL Server packaging".
I know that I haven't mis-typed the key because I have tried it many times and checked it character by character.
This upgrade option is essential for our deployment of SQL Server to our clients. If I perform a clean installation and enter the product key during setup the key is accepted.
Is this a known problem? What is the workaround?
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