Exchange 2003 to New Exchange 2013 Server move

Looking for some opinions on a generic move.

I have  a small domain all using server 2003 and I'm in the process of gathering information must cannot take anyone offline.

I have decided to just build a new domain in tandom and pick a date/test/retest etc and move them all across over time.

I have a new Exchange server (2013) built on the new domain and I have a thawte cert due to expire soon - i figure that if I put the cert on the new domain I can manually configure outlook to point to the new exchange server until I'm ready to migrate.

There's only a dozen accounts all located in the same building that I'm concerned with.

Anyone any thought about this? Or will I have to migrate users to the new domain first?

Any advice appreciated.
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imkotteesSenior Messaging EngineerCommented:

Since it is between Exchange 2003 to Exchange 2013 you cannot move directly.

As it is a new domain all together, I would say go ahead and create new mailboxes for these users.

You can export and import the mailboxes from old to new in the background or even your's themselves can do it.
Scott CSenior EngineerCommented:
You can't "migrate" the users to the new domain.  As was stated, there is no direct path to migrate Exchange 2003 users to Exchange 2013.  In fact, had you tried to install Exchange 2013 in the current domain the installation would have detected Exchange 2003 and simply stopped.

Get your new Exchange server set up, tested and working.  Create the new user accounts, export their mailboxes to PST files them import them into the new accounts in the new environment.
Steven CarnahanNetwork ManagerCommented:
I agree with imkottees.  The upgrade path from Exchange 2003 to Exchange 2013 requires that you first upgrade to Exchange 2010. With 200+ users and regulatory retention requirements we had to do the upgrade.

With only a dozen accounts it may be easier to build them from scratch on the new server.
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ChoakemAuthor Commented:
Thats what I figured too guys...

I have already built the new exchange server and I will create completely new domain accounts and mailboxes for them.

But the question really is - can a user be on an old domain and can I manually configure there outlook to connect to new exchange server using new domain credentials (just for outlook) until I'm ready to complete the move?
imkotteesSenior Messaging EngineerCommented:
Yes you can. I assume both the networks are reachable.

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ChoakemAuthor Commented:
They are indeed :P

Thanks guys - just wanted confirmation :P
ChoakemAuthor Commented:
Fast responses as always :P
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Windows Server 2003

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