Connection agreements are established between Exchange 5.5 sites and Active Directory domains to define which objects from each directory should be synchronized and where this should happen. A container in the Exchange directory, such as a recipient container, is associated with a container in the Active Directory domain, such as an organizational unit. The objects in these containers are synchronized based on the schedule defined in the connection agreement. If you plan to run Exchange 5.5 on a Windows 2000 domain controller, you must change the Exchange LDAP port to something other than port 389, the one Windows 2000 uses. 2000 ADC versions have connection agreements that synchronize mail-enabled objects between directories.
Configuration can be more complex.
One-way synchronizations will only write changes to the directory in one direction. To add to the complexity, you should define at least one connection agreement per site and domain as the primary connection agreement . This agreement creates new objects in the destination directory if those objects don't exist. Click here . In multisite and multidomain environments, you should take care to ensure objects are synchronized as needed.