Plan the new clustered GWIA, including the new domain required to house the GWIA in a clustering environment.
Make sure DNS includes the secondary IP address of the GWIA partition
Make sure your firewall is configured to accommodate the GWIA.
Create the new GWIA domain.
Set up the MTA for the new GWIA domain.
Install the GWIA.
Modify the GWIA cluster resource load script.
Modify the GWIA cluster resource unload script.
Set up the GWIA failover list and policies.
Enable Internet Addressing for the clustered GWIA.
Double-check the cluster-specific GWIA object properties.
Test the clustered GWIA.
Record cluster-specific information in the properties pages of the GroupWise objects associated with the GWIA.