We are ankles deep into a 4 entity merger - Priority one is email continuity amongst the various systems.
1 systems run Exchange 2003.
2 System are on Exchange 2010.
1 System is on Groupwise.
Is there anyway via MS or 3rd party software in which we can synchronize all 4 address books across the 4 parties involved into one great big global address book for the interim until their is a Domain/AD integration in place.
Currently each domain connects to the mothership via VPN.
Thanks in advance for any input.