Migration gone wrong – fall back scenario

Today I’ll be handling an issue I had when migrating a SQL Server 2000 database to SQL Server 2012. We migrated the database from the old, grumpy, and more importantly, unsupported Windows Server 2003 and SQL Server 2005 instance. All was well, and we had no instant issues when users started working with the application. The migration was seamless, we did not expect any future problems. Even the upgrade advisor did not give us any errors!