I have a 2008 R2 Server running exchange 2010. i have 3 service that will not start and i can't figure out why. the services are Active Directory Domain services, Intersite messaging service, and Kerberos Key Distribution center service. All the depend services are running but these 3 will not start. I think that something in the registry is either missing or corrupt. i need to get these started as soon as possible. Not sure how theses service not running will effect the endusers. email seems to be running but when i get into the console i have limited access so i know that it is effecting the right that the administrator account has.