Actually i have installed 2 Zimbra servers (1 mta and 1 store) in a 32 Bits Machine running RedHat ES 32 Bits. I've purchased 3 new servers and i want to migrate this services to this machines (1 mta , 1 active store and 1 backup store). What's the best method to do this? I'ts possible upgrade from 32 Bits OS and Zimbra package to 64 Bits OS and Zimbra??? If not, how can i do?? Install 32 Bits OS in the new machines and then migrate?