Just migrated to Exchange 2007 from Domino. In Domino we had a group address book comprised of all our customers' address info. This group book could be accessed by all users for sending email, but only the administrators could add, change or delete. I have migrated this address book over to a generic user mailbox in Exchange, so all the data is available to be exported and then imported into a group address book, but I can't seem to find a way to create a group address book where all of the addresses are external (not in active directory). I have clicked on everything that looked promising in the Exchange Management Console, and the "Help" has not of value. This seems way more difficult than it should be, so maybe my past experience with Domino has put blinders on me.