Upgrading your Exchange 2007 Server to service pack 2 is a simple and straight forward process. You can either use the GUI or the command line interface to upgrade your server.
Setup initializes a schema update as part of the installation and hence the account you use should have schema admin rights. You can also update the schema manually using a schema admin account before running the setup. If you have a multi domain environment, all domains have to be updated with the new schema attributes before upgrading exchange to SP2. Instructions for upgrading clustered mailbox servers is totally different and will be explained in a different article.
Using Command Line:
From a command prompt, navigate to the exchange 2007 sp2 installation files folder and execute the command Setup.com /mode:upgrade. The setup process starts and will update you with the success of each step as it proceeds with the installation.
Navigate to the folder that contains the exchange 2007 sp2 installation files and double click on the setup file. The splash screen will be launched, click on “Install Microsoft Exchange Service Pack 2”.
The introduction screen comes up, click Next to continue.
Accept the license and click Next.
Setup goes through the readiness checks and once you have all green, click on Upgrade.
The setup goes through the upgrade process and once you have all green ticks, click Finish to complete the installation.
Restart the server and you now have an Exchange 2007 SP2 Server. Launch EMC and navigate to Server Configuration and make sure that the version is 8.2