Last time the DST changed Microsoft got caught with its pants down. Actually they were completely off and their underwear was dirty -- but who needs to remember that?
Well, actually we all do now -- because if you've got a legacy system -- and SOMEBODY keeps reading on our blog about Exchange 2007... you might need to do some legerdemain on your data to keep it working.
OR if you're migrating from a legacy system into Office 365 you are going to be facing problems.
If it's BIG for you -- drop us a line.
We did this before.