Hello, Please bear with me, as I am not too experienced in Microsoft Exchange 2007. What I am trying to do is to configure it so that it will use only the intranet (local domain) and it will not need the internet. I've seen this thread: http://social.technet.microsoft.com/Forums/en-US/exchange2010/thread/9733c402-8e15-4984-8310-eb412ab05b12 and it looks exactly like what I want to do. It says that I would only need to install Microsoft Exchange 2007. However, I've also seen many instructions that show the prerequisites before installing Microsoft Exchange 2007 (as seen here: http://technet.microsoft.com/en-us/library/bb691354(EXCHG.80).aspx). Do I not need to follow these prerequisites anymore if I am only using the intranet? Or do I still have to follow the prerequisites, but need to install only certain features? Please advise. Many thanks for your support.

1. You still need to complete the pre-reqs for exch for your deployment, you will need at least one mbx,hub and cas server. 2. Check out the pre-reqs on tech 3. If possible I would deploy exch 2010 rather than 2007 Sukh

Hi, Yes, you need to follow these prerequisites for your deployment even though you only use the intranet. The prerequisites is mainly to prepare Active Directory directory service and domains so you still need to do that before installation. Because you don't need to contact internet and outside domain, you don't need to deploy edge server role. But you must deploy at least a Client Access server, a Hub Transport server and a Mailbox server, which all must locate in your domain. Thanks Hope this helps.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.