Need big help !!!!!!!!!!!

Dear

I have windows 2000 server with sp4,exchange 2000 with sp3,kaspersky 5.5

for exchange server,symantec corporate for file server.

can i uninstall symantec anti virus and use avast anti virus server edition with kaspersky 5.5 for exchange2000/2003.

without any kind of interfere ?!! & how to do that if possible ?!!

It should be possible.

You are very warm! Thank you for the help !
I very much appreciate you!