How to pass the global address books between two domains running exchange 2003? I have two separate domains, xyz.com and abc.com. I have created a Primay - secondary zones in both domain...ie Primay xyz.com-secondary abc.com, Primay abc.com-secondary xyz.com. I created a two-way trust between domains. Functional level of domain/forest server 2003. Everything seems to functioning. I am part of xyz.com, how do I access the abc.com's Global Address List using outlook 2003 and vice versa how to abc.com access xyz.com's Global Address List using outlook 2003? I do not know where to start.

Hello, What you are trying, synchronizing multiple GALs of different forest, is not possible without some tools like MIIS or IIFP. References: Synchronizing Multiple Exchange 2003 Forests GAL Sync with the Identity Integration Feature Pack (IIFP)