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Options to migrate mailboxes from Exchange (SBS2003) to Exchange 2010

Hello,

We are preparing to migrate from a current environment running SBS 2003 to a non-SBS environment that will run 2 servers (1 AD/DNS server and 1 Exchange server).

We are trying to determine the ideal manner in which to transer user's mailboxes from the current server to the new one.

Because this is a new non-SBS domain, we will not be able to join the new Exchange server as part of the new one in order to migrate databases directly.

We have found that exporting to PST; then reimporting to the new server has typically been the most reliable, although long drawn option.

Any thoughts on a faster, but still reliable way of doing this?  

Thanks in advance.

Regards,
Real-Timer
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realtimer
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realtimer
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Alan HardistyCo-OwnerCommented:
Why are you not joining the AD/DNS server and Exchange server to the existing domain and then just move the mailboxes between the old Exchange Server (SBS) and the new Exchange server?

You are creating more work for yourself.

Here is a great guide you can follow for the way to migrate and give yourself less grief:

http://demazter.wordpress.com/2010/04/29/migrate-small-business-server-2003-to-exchange-2010-and-windows-2008-r2/

Alan
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realtimerAuthor Commented:
Alan,

This was some very good information!! Thank you.  

For now a decision was made to do this the long tedious way in order to be able to test everything in a "lab" environment prior to going live.

However, we will certainly plan on using your recommendations for future project rollouts!!

Regards,
RealTimer
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Alan HardistyCo-OwnerCommented:
Makes perfect sense.  You can take it from me that it will all work as I have migrated many a server from SBS 2003 to Exchange 2010, but it always pays to be cautious.

Exporting to .PST and importing mail to a new domain will cause you problems because of the old X500 Address (if you reply to existing emails from internal users), but other than that, there shouldn't be any major issues or any quicker way that I can think of.
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realtimerAuthor Commented:
Great information and quick response!!  Thank you very much.
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