When you create a Messaging element:
The FQDN or IP address in the Node field for a Messaging element must correspond to the Messaging Storage Server (MSS), not the Messaging Application Server (MAS).
The login credentials must be identical between the Messaging server trusted servers screen and the Session Manager application, entity, or attributes for a Messaging type of application.
The Trusted Server Name field on the Trusted Server page maps to the Login field in the Attributes section.
The Password field on the Trusted Server page maps to the Password field in the Attributes section.
When you add an application entity using the Manage Elements pages, System Manager imports relevant data from the application instance to the Communication System Management database in the background.