You can delete a domain only when it no longer owns subordinate GroupWise objects. For example, you cannot delete the primary domain of your GroupWise system if it still owns secondary domains.You cannot delete a secondary domain if it still owns post offices. However, MTA and Gateway objects are automatically deleted along with the Domain object.
In ConsoleOne, connect to the primary domain of your GroupWise system, as described in Connecting to a Domain.
Browse to and right-click the Domain object you want to delete, then click Properties to display the domain Identification page.
Verify that the current directory path displayed on the domain Identification page is correct.
Click Post Offices, then move or delete any post offices that belong to this domain. See Moving a Post Office and Deleting a Post Office.
Right-click the Domain object, then click Delete to delete the Domain object from eDirectory.
When prompted, click Yes to delete the corresponding domain directory structure.
Stop the MTA for the domain and uninstall the MTA software if applicable.