The end of Exchange 2010 SP1 support is almost upon us! Is it really that long since Exchange 2010 SP1 was released 
Please review the lifecycle chart here for full details.
So at this point please ensure that you are on SP2, and when SP3 ships later on this year come back and check when support will end for SP2.
For details on SP2 – you can take a peek at these articles.
I also blogged about the expiration of RTM support previously.
Full details about the Microsoft lifecycle policy can be viewed here
http://support.microsoft.com/lifecycle/
I would also encourage you to sign up to the quarterly lifecycle update newsletter to ensure that you have the knowledge to keep all of your products in a supported state, and continue to receive the support that you are entitled to!
Cheers,
Rhoderick
