At the risk of beating a dead horse, I'm going to talk about DST and link to some tips and articles.
- Patch Microsoft Windows and Windows Servers for Daylight Savings Time now (Highly recommended for Windows shops)
- A great list of resources for the DST changes within Microsoft products
- Be careful when you use the Exchange DST fix
- Don’t let Daylight Savings ruin your longer day
There's also been much made about the $4,000 patch from Microsoft, and I want to clarify a few things. That $4,000 is the full suite of DST patches from Microsoft for an unlimited number of servers and client machines running old out-of-support software. That patch happens to include the Exchange Server 2000 and 5.5 (1997) patch as well. There are also free tools like TZEdit and automated scripts available for Windows 2000 that you can use to automate the entire update for all of your Windows 2000 machines. Compare this with Apple, which doesn't even offer patches for DST for any version of OS X from before 2003.