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creating a cross forest trust

Hi Experts, we recently acquired another facility to support, just trying to do some fact checking before proceeding, first off, we do now have a vpn tunnel between sites, both forests are at a 2000 forest functional level, if I'm not mistaken, both will need to be raised to a 2003 forest level before proceeeding, is there any negative impacts to worry about with doing this, all dc's and servers in both domains are either 2003, or 2008.
    Second, all I should have to do once I raise the forest levels is create dns forward lookup zones for each domain, and create the trust, is this correct?
  Thanks in advance for any advice/help!
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alexianit
Asked:
alexianit
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pwindellCommented:
I'm not mistaken, both will need to be raised to a 2003 forest level before proceeeding, is there any negative impacts to worry about with doing this, all dc's and servers in both domains are either 2003, or 2008.

I don't think you don't need to,...but doing so should be fine, ...and I would.

Second, all I should have to do once I raise the forest levels is create dns forward lookup zones for each domain, and create the trust, is this correct?

Create the Zones,...then setup Zone Transfers to populate them.  You could skip all that and use conditional Forwarders,..but personally I have always preferred Zones with Zone Transfers.

Trusts
Remember that Trusts do not give you permission to do anything. After the Trust is established nothing changes,...what Trusts do is give you the ability to grant/apply permissions,...and then it is those permissions that actually "make things happen",...not the Trusts themselves.
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