Hello I'm running Exchange 2007 SP2 in my company. Under remote domains we have loads of domains, and under Accepted Domains we have even more. One of the reasons is that we also relay messages to partner companies. I want to work out which domains our Exchange system "owns", that is it is purely responsible for. Does anyone know how I can do this?

Email Address Policies is probably the first place to look. That will show you what domains Exchange is putting on to user accounts automatically. Simon.Simon Butler, Exchange MVP Blog | Exchange Resources | In the UK? Hire Me.

As Simon mentioned, you can check EAP (Email Address Policies) to know the Exchange domains. As an additional information about EAP and Accepted Domains, please refer to the following article: http://technet.microsoft.com/en-us/library/ff354977(EXCHG.80).aspx Thanks. NovakPlease 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.