Microsoft today announce a new feature in Bing Webmaster Tools called Track Certificates. This allows you to track and review certificates that were requested by browsers visiting your site right from within Bing Webmaster Tools.
Track Certificate not only shows you the certificates we encountered, you can also directly report certificates to Microsoft if they look fraudulent or suspicious. All reported certificates will be reviewed and appropriate action will be taken by Microsoft, including involving the issuing Certificate Authority, or informing other browser manufacturers about the certificate.
You can find Track Certificates in a new Webmaster Tools section called “Security” (which going forward also contains the Malware Re-Evaluation tool).