Is the exchange calendar update required for Exchange 2003?

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Q: Is the exchange calendar update required for Exchange 2003? Or does the patch cover everything? I have a mixed environment with and Exchange 2000 and 2003 server
A: the calendar update tools are not required. The tools are there to help you move in bulk calendar items in the delta period (3/11-4/1). Some of our customers have decided the tools weren't the answer for then and are in the process of having end users manually move their calendar items. MSIT did run both the server and client side tools depending on the circumstances. Please review support.microsoft.com/kb/930879/en-us.