Novell® Messenger does not require the existence of a GroupWise® system in the cluster, but presumably one has already been set up as described in Section 30.0, Planning GroupWise in a Heartbeat Cluster, Section 31.0, Setting Up a Heartbeat Cluster, and Section 32.0, Setting Up a Domain and a Post Office in a Heartbeat Cluster. As part of the process of setting up GroupWise in the cluster, you filled out the Heartbeat Clustering Worksheet. Some of the information from that worksheet is helpful as you implement Messenger in your cluster.