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How do I set up DC and AD on Exchange 2000 with an NT4 Exchange 5.0 PDC already in place?

I have one NT 4.0 (alpha) server. This server is low and doesn't have any disk space to spare. It is the PDC (no BDC in the organization) and it has Exchange 5.0 SP 2 installed on it. We purchased a new server (Intel), and we want the new server to be the DC, ADS (only DC in the organization) and run Exchange 2000 on it.

My question is, how do I get it done? My thought is:

  1. Install NT 4.0 on the new server and make it the PDC.
  2. Install exchange 5.5 on the new server.
  3. Migrate the mailboxes from old 5.0 (old server) to 5.5 (new server).
  4. Upgrade the new server to Windows 2000 and make install ADS.
  5. Upgrade in place from Exchange 5.5 to Exchange 2000. (Will this take too much time?)

    Will this work? I also appreciate any technical details, as I am not sure how to do it yet.
    One of Microsoft's general recommendations is to NOT run Exchange 2000 on a domain controller. There are a couple reasons for this -- one is that is complicates recovery; another is that both AD and E2K are resource-intensive applications and they need a lot of horsepower and benefit from a dedicated system. There are also security implications to consider, as well.

    Having said that, there's nothing to prevent you from doing what you intend. The steps you have outlined are reasonable and should work for you. It's hard to tell how much time your in-place upgrade will take. One other option would be to upgrade your 5.0 system to 5.5 SP4, then move the mailboxes from the 5.5 server to the E2K server. This way, only one user will be down at any given time (e.g., the user whose mailbox is being moved).

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