Which update mode is best for updating my client's calendars?

Q: Which of the update modes will most quickly, efficiently, and unobtrusively accomplish updating my client’s calendars. Also, where do I find info on the CDO update?
A: Before you run the Exchange tool, make sure that client and server computers are updated correctly with the following updates:

Install the Windows daylight saving time update on clients. For more information about how to update a computer that is running Windows operating system software, click the following article number to view the article in the Microsoft Knowledge Base 931836, support.microsoft.com/kb/931836. You can get the CDO patch from support.microsoft.com/kb/926666.