<Update on Jan 2, 2023: GA release>
Microsoft is excited to announce the GA release of SCOM management pack for Certificate monitoring! We are thankful to the immense response to the previous (...
I have attached the Certificate MP Guide for your reference. Please look into the section titled "Specifying Issuer Name to Include/Exclude".
In this section, it explains that there may be certificates which users will wish to include or exclude from discovery and monitoring based on the Issuer Name. The configuration page allows administrators to specify regular expressions which must be matched for a certificate to be monitored and a separate regular expression to specify which certificates to exclude.
In the screenshot, we want to exclude the certificate issuer "MOM Lab".
If the default values (empty) are used, all certificates will be included, and none will be excluded. A certificate must be included before it can be excluded (so it is possible to include all Microsoft certificates but exclude certificates for Microsoft Exchange).