Adrian Hills • 6/5/2013

SQL Server 2008 R2 in-place upgrade error

The article details troubleshooting an error during a SQL Server 2008 to 2008 R2 in-place upgrade where the installer fails with 'The specified user does not exist'. The solution involved changing the SQL Server service account from UPN format (user@domain.local) to the Down-Level Logon Name format (domain\user), resolving the compatibility issue.

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#SQL Server #Service Account #In Place Upgrade