Only DC crashed

We have a client we just took over.  They have an active directory domain with one DC that just crashed.  
To make things more complicated.  They also have an exchange server tied into their network.  
Does anyone have any ideas as to what will happen if we need to create a new domain?  Does this mean that the exchange server is as good as gone too?  We do have access to the logs and database for the mail server.
DaveKall42Asked:
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AmitIT ArchitectCommented:
Exchange server is not gone, but it won't work without AD. If you have DC system state backup, you can rebuild it again. Else you need to build new DC, all new user, new exchange server, new mailboxes. Use 3rd party tool to extract data from edb to pst and merge into new mailbox.
DaveKall42Author Commented:
That's what I thought...  Thanks for your input.
Will SzymkowskiSenior Solution ArchitectCommented:
If the company has a system state backup for Active Directory they could recover the DC this way and possibly keep Exchange alive. However if you create a new domain (even if the internal FQDN) is the same you will still lose Exchange as already said.

What you can do is export all of the mailboxes to PST's and then import them back into your new Exchange environment if this is the way you decide to go.

I would recommend Kernel Data Recovery Exchange Server.
http://www.nucleustechnologies.com/Exchange-Server-Data-Recovery.html

This software allows you to export all of the mailboxes to PST files offline without having the Exchange server online. All you need to do is point to the Exchange EDB (database file) and the software does the rest.

Will.

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DaveKall42Author Commented:
Looks like we just got the DC back up and running and will be promoting another.  Thanks for the good input!  Might need it some other time in future.....or hopefully not.
AmitIT ArchitectCommented:
Apart from creating one more DC. Also take regular system state back.
DaveKall42Author Commented:
What do you mean by that?
AmitIT ArchitectCommented:
With DC system state backup you can restore AD easily.
DaveKall42Author Commented:
oh right, you mean't do system state backup. Yes, we will do that.
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