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Exchange migration - move from 03 to 2010 first?

I have Exchange 2003 in one domain (Domain A)

I have Exchange 2010 in another domain (Domain B)

I have a third domain where we will start with EXCH2010 and eventually move to 2013. (Domain C)


Do I:

1. Move A to C, and then B to C?

2. Move A to B, then B to C?

Does Exchange handle more than one domain?
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Paul Wagner
Asked:
Paul Wagner
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2 Solutions
 
R--RCommented:
Is it in the same forest?
Exchange can handle multiple SMTP domain and domain in same forest.
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Paul WagnerFriend To Robots and RocksAuthor Commented:
Both Exchanges exist in different AD's and different domains.

All three domains are trusted.
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R--RCommented:
Is it in different forest?
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Paul WagnerFriend To Robots and RocksAuthor Commented:
Yes
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R--RCommented:
Then this would be a cross forest migration. Also there is no path migrating from Exchange 2003 to Exchange 2013. you have to migrate first from exchange 2003 to exchange 2007/2010 then migrate from exchange 2007/2010 to exchange 2013.

Here is the link.

http://careexchange.in/cross-forest-migration-guide-exchange-2003-to-exchange-2010/

http://careexchange.in/cross-forest-migration-guide-exchange-2010-to-exchange-2010/
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Krishna PatilCommented:
I think, Exchange server as such you cant move to other domain(outside forest), but users can be migrated

Microsoft has developed tool for this
http://social.technet.microsoft.com/wiki/contents/articles/13904.how-to-migrate-users-across-forest-cross-forest-using-admt-3-2-with-sid-and-passwords.aspx
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Paul WagnerFriend To Robots and RocksAuthor Commented:
I understand what you guys are saying, but that doesn't really answer my question...

I currently have two domains in production and a new third not being used.

Do I:

1. Move A (2003-production) to C (2010-production), and then later move B (2010-production) to C (2010-new)?

OR

2. Move A (2003-production) to B (2010-production), then B (2010-production) to C (2010-new)?
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Simon Butler (Sembee)ConsultantCommented:
How many users involved?
If a lot, I would migrate the 2003 server to 2010 (same domain), then cross forest straight to the new domain.
That will save doing PST file type migration.
Then move b to c, again on cross forest. Once you have everything moved, then go Exchange 2013 (SP1 should be out by then).

Simon.
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Paul WagnerFriend To Robots and RocksAuthor Commented:
Simon,
this says that I can't go from exchange 2003 to 2010 in server 2003.

http://technet.microsoft.com/en-us/library/dd638130(v=exchg.141).aspx
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Simon Butler (Sembee)ConsultantCommented:
You cannot in-place, but I didn't say in-place upgrade. I said migrate. So that will require a temporary server.

Simon.
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Krishna PatilCommented:
First approach is fine and no need to migrate from A to B.
But after migrating to C from exchange 2003, you need to decommission exchange 2003.

After decommission of exchange 2003, you can go ahead with exchange 2013 in domain "C"
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Paul WagnerFriend To Robots and RocksAuthor Commented:
He he. Nice.

Good call. So you're saying to temporarily build a server just to house exchange 2010 on domain A, do the migration, then move 2010 to the new domain (C).
Is that right?
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Pankaj_401Commented:
Good said Simon.
Direct migration from A (2003-production) to C (2010-production) is not possible. You will have to move either to an Exchange 2007 or Exchange 2010. You can check this link to get appropriate direction : Mailbox migration to exchange online
However, you can have try any good software like http://www.exchangemigrationtool.com/ by which you can proceed further moving exchange server direct from exchange 2003 to 2013 without any boundation.
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Simon Butler (Sembee)ConsultantCommented:
Once you have everyone on Exchange 2010, even on a temporary server, doing a cross forest migration becomes pretty easy, just make sure that you read up on the process on TechNet first. No need for a third party tool.

Simon.
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Paul WagnerFriend To Robots and RocksAuthor Commented:
Best solution I've found! Totally took the complexity out of the migration.
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