Source: GroupWise Message Transfer Agent.
Explanation: The GroupWise 6.x MTA cannot run in a WP Office 3.1 domain.
Action: Run the WP Office 3.1 Message Server in the 3.1 domain. To communicate between WP Office 3.1 and GroupWise 6, a GroupWise 4.1 domain is required. You cannot upgrade directly from WP Office 3.1 to GroupWise 6. To retain users' mail and appointments, you would need to upgrade to GroupWise 4.1 first.