Hello Donka,
Thanks very much for your response.
The certificate was created in and issued by the Root CA (Secure Login Server).
I have exported the PSE file and imported the file into ABAP using transaction STRUST.
I looked before saving the file and the file was still correct (e.g. Issuer is still Root CA), then I have saved the file into the Server SSL-node.
After saving this file, the certificate was Self-Signed and the issuer was not part of the certificate path.
This issue only occurs in ABAP (ICM) and not in AS Java.
I am using an SSL certificate in AS Java and all works fine, no certificate warnings.
SSO is working it's just the warnings we get when trying to open the URL.
I am sorry I can't send any screenshots right now.
Regards,
Ridouan