Hallo Marian, i don't think the Polish site admins can help. We would need to ask the Polish CA to change their root CA. I read up a little about X.509 SAN: I don't see the extension being mentioned as mandatory anywhere. The email address and URL in there we probably don't use. (I would be more concerned about the missing CRL entry.) Can or should we double check with an X.509 expert before we make a request? - Stephan -- You are receiving this because you are subscribed to this thread. Reply to this email directly or view it on GitHub: https://github.com/xrootd/xrootd/issues/1110#issuecomment-576701176 ######################################################################## Use REPLY-ALL to reply to list To unsubscribe from the XROOTD-DEV list, click the following link: https://listserv.slac.stanford.edu/cgi-bin/wa?SUBED1=XROOTD-DEV&A=1