After the Exchange Gateway is up and running between the GroupWise system and the Exchange system, there are a variety of ways to refine its configuration to meet the specific needs of your e-mail users.
Section 8.1, Enabling Directory Synchronization and Exchange of Address Books
Section 8.2, Configuring Addressing Instead of Using Directory Synchronization and Exchange
Section 8.3, Changing the Link Protocol between the Exchange Gateway and the MTA
Section 8.8, Binding the Exchange Gateway to a Specific IP Address