Problem in updating avg antivirus
For an example of how to do this with Windows NLB see the following article: For other load balancers refer to your vendor documentation for how to take servers out of the load balanced array for maintenance and updates.I admit I was concerned when I read the release notes for Exchange 2010 SP3 that state: The database schema has been updated in Exchange 2010 SP3.Client Access servers are the first server role to update, and you should begin with the internet-facing site if you have multiple sites in your organization.
When the installation has all completed successfully click the Finish button.
Microsoft has released Service Pack 3 for Exchange Server 2010.
This is a significant release that delivers some key functionality to customers such as support for Windows Server 2012, support for co-existence with Exchange Server 2013 CU1, and general bug fixes and security updates.
If you are planning to upgrade your Exchange 2010 servers to SP3 you should be aware that there is an Active Directory schema update involved.
If that is a concern for your environment, but you still want the bug fixes and security updates, you might consider sticking with Service Pack 2 and applying Update Rollup 6 instead.