I would open a case with Microsoft Support. Intalling Exchange on a DC is not recommended for this very reason. Once you get AD restored with their assistance, they can help you get Exchange back online assuming you have valid backups.

Hi All, I am really in trouble with my Exchange server. I have an IBM 3650 M3 server with Windows Server 2008 R2 x64. I have installed active directory and microsoft exchange server 2010 on it. I have taken a full system backup using Windows server backup. Now the problem is I cannot restore the same environment on a different hardware. I have done authoritative system restore on a HP Pavilion but after restarting it is giving blue screen error. No way I can get back to the system. If full system restore is not possible on a different hardware then please help to accomplish at least two things.. 1. I want all the active directory users with all OUs to be restored on a differnt system with same or different domain name. 2. Restore the mail boxes on the exchange server and sychronize between AD and the respective mailboxes. By doing this I can bring back my exchange server. Can anyone help me? Thanks and regards, Saikat ChatterjeeRegards, Saikat

What is the status of your current server ? If the domain controller is working fine then I will suggest you to make the other server as additional domain controller then transfer all the FSMO roles to the additional domain controller and then move Exchange to the additional domain controller.Please remember to click Mark as Answer on the post that helps you, and to click Unmark as Answer if a marked post does not actually answer your question. This can be beneficial to other community members reading the thread.

Hi, That is not recommend by Microsoft. Base on my research, I find some related information which may helpful to you, if you have additional Domain Controllers in the envirnment. How to Move Exchange Server 2010 from a Domain Controller to a Member Server http://msexchangeguru.com/2011/02/27/move-exchange-to-a-member-server/ This response contains a reference to a third party World Wide Web site. Microsoft is providing this information as a convenience to you. Microsoft does not control these sites and has not tested any software or information found on these sites; therefore, Microsoft cannot make any representations regarding the quality, safety, or suitability of any software or information found there. There are inherent dangers in the use of any software found on the Internet, and Microsoft cautions you to make sure that you completely understand the risk before retrieving any software from the Internet.