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Did you apply the changes after removing SYSADMIN? before proceeding to do the rest..
Yes. However I tried to perform the changes using a different sysadmin account. Care for a screen share?
david we need to follow each other, to send any message privately.
It seems that the user in question, may have been the Owner of the Database. Once you make some other user, the owner of the Database, you should be able to rename. Give it a try...