To function as a POP3/IMAP4 server, the GWIA requires access to each post office that contains mailboxes that will be accessed by a POP3/IMAP4 client. Post office links are modified on the Domain object of the domain that owns the post offices.
In the GroupWise Admin console, browse to and click the name of a domain.
Click Post Office Links, then click the name of the post office.
Edit the post office link as needed, then click OK.