We are in the process of migrating users from iPlanet to Exchange Server 2003 running on Windows Server 2003 in a Windows Server 2003 Domain Functional level domain. Exchange 2003 is configured as non-authoritative for domains we accept external mail for, and this is working as expected. Users will be using a combination of Outlook 2003 and OWA to access their mailboxes. All users have AD accounts.
As we migrate users off the old system, we would like them to see all users in the GAL. The migration will be done in batches.
I am looking for the best method to allow newly migrated Exchange user to view a GAL that will allow them to send e-mail to users on iPlanet.