There can be several causes for this issue. If any combination of the below situations apply, please follow the steps in the Resolution.
Can’t login to WebAccess, can’t access mailbox using WebAccess, but can with the GroupWise Client.
Unable to access mail using the web portal WebAccess.
During WebAccess login, some users receive the following error: [9505] Your post office is unavailable. The post office Agent might not be configured for SOAP. Please contact your system administrator.
A few users belonging to the same Post Office are unable to login to WebAccess; however, some users (from the same PO) are able to login fine.
WebAccess is installed on a separate server.