2) Setup runs the exchange pre-requisites check for the mailbox role:
3) Setup successfully finishes:

4) Once the passive node is upgraded, restarted and is back online, run the following command:
Stop-ClusteredMailboxServer MBX –StopReason “SP2 Upgrade” (where MBX is the name of your CMS)
5) Confirm the steps:

6) Check if cluster status is Offline:
7) Move the mailbox from active to passive node:
Move-ClusteredMailboxServer MBX –TargetMachine CCR2 –MoveComment “SP2 Upgrade” (MBX is your CMS and CCR2 is your current passive node that was upgraded with SP2)
8) Upgrade the CMS:
Setup.com /UpgradeCMS

9) Upgrade the initial Active node: setup.com /Mode:Upgrade

10) Check the pre-requisite and the success of your SP2 upgrade:

11) Restart the server and now you have an Exchange 2007 SP2 CCR
For AD preparation and extend the schema
You should extract the SP2 files into each Exchange box them run the following steps:
1)
Extend the schema-- I recommend you to have a System State backup first from your Schema Master domain controller and if you are running a Virtualized environment or have a lab server, apply the Extended schema changes into these environment and if everything is working fine you can go ahead and apply into your production server:
setup.com /PrepareSchema
2)
In order to prepare Active Directory you must meet all the pre-requisites:
· You must be running the Exchange 2007 setup with a domain account that is a member of the Enterprise Admins security group.
· The machine on which you run the Exchange 2007 setup schema extension process must be a member of the same domain and Active Directory site as the Schema Master.
· The machine on which you run the Exchange 2007 setup schema extension process must be:
o Windows Server 2003 SP2 with Windows Installer 4.5 installed
o Windows Server 2008 with Windows Installer 4.5 installed
o Windows Server 2008 SP2
o To extend the schema, you simply run this command from an administrative command line:
setup.com /PrepareAD
Upgrade other Exchange server roles
For the other Exchange roles, just run the command: setup.com /Mode:Upgrade
Accept all default options when you perform the steps from the command line.
I hope all those new features are good for your organization and if you have any doubts, please contact me. Also I recommend you to check the following links:
Exchange Server 2007 SP2 release notes:
http://download.microsoft.com/download/8/3/E/83E9DB24-0041-4F7E-A0DD-26043BBF7CAA/RelNotes.htmDownload Exchange Server 2007 SP2:
http://www.microsoft.com/downloads/details.aspx?FamilyID=4c4bd2a3-5e50-42b0-8bbb-2cc9afe3216a&displaylang=enWhat is new in Exchange Server 2007 SP2:
http://technet.microsoft.com/en-us/library/ee221150.aspx