I tried to upgrade to Workflow 12.0.2605.385 from 12.0.2510.3321 today and received the following message:
I tried changing the certificate field to Optional and still got the same message. I know the account that I was logged in with and the account running the Workflow services have access to the SQL server in question.
I endedup uninstalling and reinstalling the previous version with the exact same accounts and SQL server and it is working.
Any ideas what is different about 12.0.2605.385 that would cause this?