I know many organizations were looking a way to migrate from their Exchange 2010 hosting mode to Exchange 2010 SP2 normal mode. Microsoft Exchange team has released the white paper to carry out this procedure.
Like the previous HMC to Exchange 2010 SP2 guidance, it contains a white paper and some PowerShell scripts. The white paper describes the migration process, and the scripts provide a starting point for your own migration toolkit. Of course the exact migration steps and methodology you will need to follow will depend upon what you have deployed, but we hope what we have provided will help you with your efforts and provide you some useful tools and information.
Download the white paper from http://www.microsoft.com/download/en/details.aspx?displaylang=en&id=28788
Read my favorites blogs:
Designing a backup less Exchange 2010 Architecture
Step by step guide for upgrading Active Directory from Microsoft Windows 2003 to Microsoft Windows Server 2008
Microsoft Exchange 2010 CAS Array – Steps and Recommendations
Appear Offline in Microsoft Office Communicator Server 2007
Microsoft Exchange 2010 Test cases
Microsoft Exchange Server 2010 Disaster Recovery