Taken from the SAP Help page,
This function generates a verification PSE for the selected PSE that contains the PSE’s own certificate and the certificates you select from the certificate list.
You can then distribute and use this verification PSE to verify the digital signatures created by the corresponding certificate owners.
For example, with this function you can export the public-key certificate and the certificate list and import the verification PSE into other systems so they can accept logon tickets from your system.
Open transaction code STRUST or STRUSTSSO2. Click on Verification PSE.
Click Yes to Only add own certificate to verification PSE?
Save it to your local laptop.
