If you are using individual PSEs, then use the procedure below to import the public-key certificates belonging to the application server's communication partners into the server's certificate list.
Using the trust manager (transaction STRUST):
The SNC PSE's information appears in the PSE maintenance section.
The import dialog appears.
The certificate's information appears in the certificate section.
The certificate is added to the PSE's certificate list.
The partner's public-key certificate is added to the application server's certificate list.