ServiceControl.ps1 AuthorizationManager check failed Error Back
This error was fixed for the exchange Rollup but looks like this was not done for Service Pack Install. If you are using remotesigned or restricted execution policy in PowerShell the SP2 Upgrade will fail with error " AuthorizationManager check failed. As per our understanding this is because the Install Stops and disabled service required by PowerShell to Execute a Signed Script and since the service is disabled it cannot retrieve the current execution policy and provide with AuthorizationManager failure error.
The exchange initial rollup had the same problem and was fixed it later rollup, can't understand how they missed this for Service Pack 2