I'm troubleshooting an issue with email delivery to Exchange Online.  I've setup an inbound connector in Exchange Online (Your org to O365) and set to verify the subject name on the certificate.  The email is getting delivered to Exchange Online but not using this inbound connector.  I have a valid certificate installed on the server with Xeams.  I can see the certificate is used when sending an email form a workstation to the server.  However, I can't validate the certificate used when the message is sent from Xeams to Exchange Online.  I could not find the certificate in the Wireshark capture from Xeams to Exchange Online.  Any suggestions?