Open the GroupWise Administration Console in the web browser.
Go to 'System - Trusted Applications
Click 'New' in the 'Trusted Applications' window.
A popup for a 'New Trusted App Key' will appear. Type 'GroupWise Mailbox Management' in the 'Name' field.
Click ‘OK’
You can either copy the key or click ‘Export’ to save it as a TXT file to make sure you do not lose the key.