Rejoin and Restore Exchange 2007 to new Active Directory

Due an electrical failure, my Windows 2003 Active Directory server go away!
Now I must create a new domain forest. This new forest is on Windows 2008 Enterprise server  but I don't know how restore my Exchange 2007.
What steps do I must follow to rebuild my Exchange Organization?
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First, did you not back up your active directory with a least a system statebackup?
If so, you can possible recover AD
What happens when your dc was rebooted?

Did you have another  domain  controller online that has a replica of the global catalogue? If so, you could sieze the FSMO roles to this dc and not have to rebuild exchange.

If you have to create a new forest, unfortunately, I would just extract the mailbox data with exmerge tool to pst's, and rebuild the exchange organization in the new forest.

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mbrenesAuthor Commented:
Unfortunaly I must start again with my AD. :( and I appreciatte your opinion.
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