Dear Techies, I has an environment of 4 servers two servers are dedicated to Active Directory (PDC & BDC) and the remaining two are dedicated to Clustered Exchange environment, Unfortunately Yesterday My Primary Domain Controller crashed due to hard disk failure. So I seized all the FSMO roles to the Backup domain Controller, Active Directory is working fine after seizing the roles (all users and policies are fine), but Ifound that my exchange server is not working, I restarted both the Active Directory and Exchange servers but no luck, can anybody explain me that what are things to be done from exchange side in this situation. I Stuck in this situation, Quick Replies will be appreciated.Thanks in advance. Regards, Phani Kumar .B

Hi Phani, Whats the errors do you get on Exchange servers? Are you able to start all services? Additionally, look for the 2080 event in application event log and make sure that Exchange server is able to communicate with DC/GCs as per below KB. http://support.microsoft.com/kb/316300 Run ExBPA and check for any error.

Hi Phani, Please refer to the following thread which have the similar problem: http://forums.microsoft.com/TechNet/ShowPost.aspx?PostID=4119436&SiteID=17 Meanwhile, in order to eliminate confusion, I have deleted the duplicate threads you post which have no reply in other Exchange sub-forum. Thank you for your understanding. Please do the suggestions in that post. I suggest running Exchange BPA first. Thank you, Elvis