Exchange 2010 SP2 Update Rollup 1 Fails

Exchange 2010 server that has User Access Control (UAC) enabled fails to install Update Rollup 1.

Symptoms: The install flys by with no waiting at steps, especially the generating assemblies.

Cause: The roll up requires .NET assemblies to be rebuilt. This step takes place BEFORE the msp asked for administrative control in UAC.

Resolution: Run a CMD as administration then execute the msp!

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