Moving Exchange 5.5 to a different server in same site

[azzy]

Moving Exchange 5.5 to new server in same site


Server A Server B
Xeon processor PII 450 x2
WinNT 4 Win2K
Exchange 5.5 Exchange 5.5

Server A is currently our exchange 5.5 server running WinNT 4.0 with a single processor. My plan is to add a second
processor and upgrade the OS to win2K but to do a clean install then re-install Exchange 5.5.

I just built Server B with OS Win2K and plan on installing Exchange 5.5. I want to use this server while I down the other server
so I will need to transfer the mailboxes, and everything else to Server B. After Server A is completed I will transfer everything back from
Server B to Server A.

What would be the best method to accomplish this. All help would be greatly appreciated.

Thanks
Azzy (newbie at Exchange)