External System Synchronization: You can use the External System Synchronization feature to automatically exchange domain, post office, user, resource, and distribution list information between the two systems. After the initial exchange of information, any information that changes in one system is automatically propagated to the other system in order to synchronize the information in that system. This is the recommended method for exchanging information between two systems. For information about setting up synchronization between two external systems, see External System Synchronization in GroupWise System Operations in System in the GroupWise 2012 Administration Guide.

Manual Creation of Information: You can manually create the other systems’ objects (domains, post offices, users, resources, and distribution lists) as external objects in your GroupWise system. When doing so, the names of your external objects need to exactly match the names of the objects as defined in their system. Domains in your system link to the external domains indirectly through the first external domain you created (this is the external domain that one of your system’s domains has a direct link to). The advantage to this method is that you can choose which of the other system’s domains, post offices, users, resources, and distribution lists you want included in your system. The disadvantage is that there is a great amount of administrative overhead involved in creating all the objects and, after the objects are created, no automatic synchronization takes place so updates must be made manually.