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Originally Posted by SoUnCool

only BES 5 SP2 is supported for SQL 2008 R2, make sure you are at this level

also check this article on how to move from SQL Express to SQL server

KB12247-How to move from a Microsoft SQL Server Desktop Engine (MSDE) database to a Microsoft SQL Server database

if you are not comfirtable with above, uninstall BES from your standby server, then install new BES 5.0 SP2 with db on a sql server, and use migrator tool with BES resource kit to move users over to new BES. minimum down time for users since each migration will take only couple of minutes

This is the solution that has been mentioned. Definently the safer way but would need a secondary SRP. If I could locate the one from our older BES 4 server, that would be okay. I was hoping for a quick fix but it does not seem like it.