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Migrate Exchange mail store from 2003 to 2010

Hi,
I want to pick up the contents of an existing Exchange 2003 mail store and move it a brand new Exchange 2010 server in a totally different domain.
Any ideas how to do this or do I have to just use Outlook and Export to .PST ?
Thanks
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nmxsupport
Asked:
nmxsupport
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4 Solutions
 
Glen KnightCommented:
You cannot "pick up" the store.

You will have to export it to PST using exmerge: http://www.experts-exchange.com/Software/Server_Software/Email_Servers/Exchange/A_2710-Export-mailboxes-using-Exmerge-and-Exchange-2003.html

You can then re-import it using Exchange 2010: http://www.experts-exchange.com/Software/Server_Software/Email_Servers/Exchange/A_2709-Importing-PST-files-in-to-Exchange-2010.html

When you do this you will not be able to reply to any old messages unless you add the X500 address, you can do this using ADModify by following this guide: http://support.microsoft.com/kb/909271
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nmxsupportAuthor Commented:
Ok Thanks for the pointers, I did think as much, we were considering forest trusts between the domains etc but I think this is additionaly work.
I read the exmerge has 2gb limitation on mailboxes is this correct?
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Glen KnightCommented:
Yes it does, you can make multiple passes using filters though as explained in my guide.
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nmxsupportAuthor Commented:
Hmmm it could be messy trying to guess how to filter a 7GB mailbox, could take hours, who knows how much data is in which date range?  Is there any 3rd party products that can be purchased that will allow export to PST for mailboxes greater than 2gb?
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nmxsupportAuthor Commented:
Maybe I can create a forest trust and move mailboxes between the 2 exchange servers?
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Glen KnightCommented:
You could but you would also need to use ADMT which will complicate it.

7GB mailbox I would do with outlook
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lucid8Commented:
If you want to use ExMerge to export mailboxes in excess of the ANSI PST 2GB limit ( ANSI PSTs start to actually degrade after they reach 1.8GB)  I would suggest you check out this link http://theessentialexchange.com/blogs/michael/archive/2009/10/16/exporting-mailboxes-larger-than-2-gb-on-an-exchange-server.aspx which will allow you to created overflow PST's i.e. when the PST reaches the ANSI limit a new PST is spawned.
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nmxsupportAuthor Commented:
In fairness to lucid8 I did ask if there were any 3rd party products that could assist in this process as I  am struggling to find another solution at the moment.
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Glen KnightCommented:
There are a number of other tools that allow you to extract data from an offline EDB file, like: http://www.kerneldatarecovery.com/buy-edb-email-recovery.html

But if the store is not offline there is no need to do that.  You can just follow the steps in my first post.
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Glen KnightCommented:
This question has been classified as abandoned and is being closed as part of the Cleanup Program. See my comment at the end of the question for more details.
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