SSL certificate expiration from list with PSE type
When in SM21 appears warnings regarding SSL certificate you can go in SA38 and run the report: SSF_ALERT_CERTEXPIRE.
Next will appear all certificates and if any will expire, it will appear with red the date. (At this moment I do not have one to expire).
Here you will see what certificate needs to be replaced.
Next go to STRUST transaction and look for the expiring certificate.
Go to edit so you can import the new certificate.
And after add to the certificate list (with extension .CER-Base64) and save.
Delete the old one.
Next you can go to sa38—>SSF_ALERT_CERTEXPIRE, you will see that the certificate date is not in red anymore and was changed with the good one. (example about how it looks like the date when the certificate will expire soon: 12.05.2017).