Exchange 2000 to 2003 Migration

I am doing a 2000 to 2003 migration. To my understanding I need to upgrade the 2000 front end to 2003 first. My question is can I then leave the back end 2000 for a few days while I build the new 2003 exchange server on the back end? Or will I have problems with the 2003 front end and 2000 back end?

Thank you all.
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The_KirschiConnect With a Mentor Commented:
Its correct that frontend servers should be upgraded first, yes.
It also should be no problem to run 2000 on the backend for a few days.
rakeshmiglaniConnect With a Mentor Commented:
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