This service pack is pretty important, as it enables the following:
- Coexistence with Exchange Server 2013, once Cumulative Update 1 for Exchange 2013 is released.
- Support for installation of Exchange Server 2010 on Windows Server 2012
- Support for Internet Explorer 10
- For Hybrid Exchange deployments, future coexistence with Wave 15 of Office 365 and Exchange 2010.
As usual check out the release notes for Exchange 2010 SP3 and ensure if you’re using any third party software that the vendor supports SP3 also. Naturally, the same goes for Exchange 2013 if you’re considering it, and always make sure you’ve got backups that you’re confident you can restore to.
For Exchange 2007 organizations hoping to upgrade, Update Rollup 10 for Exchange 2007 Service Pack 3 has also been released. Just like Exchange 2010 SP3, the missing link is now only Exchange 2013 CU1.
My advice would be to try things out in your lab environment before considering implementing in production and consider giving the community a few weeks to discover anything unusual.
Downloads and more information
Relevant KB Articles at Launch