I am moving our Townships email from an external web-hosted system to an inhouse Exchange 2007 server. We currently share the building with our local Police department. The PD also uses the same webhost as their email provider and will need to access to the Exchange sever once we move inhouse. My concern is administering their mailboxes and the GAL once we go inhouse as they are on a separate domain. We are on on the same network topology and are separated at the firewall using VLANs. Giving them access shouldn't be an issue. Thier email address are/will be the same as ours "name@township.org" I know I would add a mailbox via Active Directory on my domain for my users; do I need to have them added as users (one for each mailbox) on my domain? or Should their DC be configured to allow their IT guy to add Exhange mailboxes from his domain? I would prefer not. Can we share the same GAL and email domain names? Moving to the new server is going well. It's just this grey area that has me concerned. I want to be the defacto admin for the Exchange server but I have no say on their domain or network in general from my firewall on. The PD has around 30 email users. Any info provided would be much appreciated.
