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One Exchange Server in Two Forests

Posted on 2009-04-04
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Last Modified: 2012-05-06
I have two companies (2003 Servers), company1.com and company2.com. Each company has a separate domain in a separate forest. There is a two-way trust between the two domains in the two different forests. Company1 has an Exchange 2003 server. I would like to be able to assign Exchange boxes to users in Company2 and have the single Exchange server in Company1 handle all mail for Company2. Is this possible or is there an alternative solution?
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Question by:cberrymd
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Expert Comment

by:kyodai
ID: 24066542
An exchange server can only be assigned to one forest. However, using connectors you can connect the organizations which should be sufficient.  I'd think about migrating this into one forest and one AD, i think with recepient policies you will easily be able to manage both companies in one forest anmd save loads of resources as right now you have doubled administrative work. We have several domains from different companies in our forest and not having any problems.
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Expert Comment

by:wpathan
ID: 24066657
We can have only one exchange organization per forest as already said above, hence I completely agree to migration Comany2 to your Company1 Forest.
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gupnit earned 500 total points
ID: 24071823
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Expert Comment

by:bdesmond
ID: 24072221
The resource forest model is the way to go - Company1 would be the "Resource Forest" in the eyes of Company2.

There's nothing to do here with connectors, and there's no reason you need to collapse the forests into one really.

Thanks,
Brian Desmond
Active Directory MVP
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Expert Comment

by:gupnit
ID: 24073873
This is what I had said :-)
Cheers
Nitin Gupta (gupnit)
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Author Comment

by:cberrymd
ID: 24140669
Any links for setting this up with Server 2003 and Exchange 2003? Everything above was for 2007.

Thanks
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Expert Comment

by:gupnit
ID: 24144013
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