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I dug up some emails HARICA exchanged with Microsoft Root Program
Managers back in June 2021. We indicated that the Root Store Policy
at-that-time had a "catch-all" phrase implying that OCSP URLs must
be included in all Certificates trusted by Microsoft.<br>
<br>
After it was pointed out by a Microsoft representative that it is
not required for Code Signing Certificates, we reached out to
Microsoft asking what is the case for other types of certificates.
Their response was:<br>
<br>
<span style="color:#1F497D;mso-fareast-language:EN-US">"Removing the
OCSP URLs from non-TLS certificates is acceptable."</span><br>
<br>
I know this is not a "normative statement" but for me it confirms
that OCSP is not required for S/MIME Certificates in the Microsoft
Root Program. So, unless there is an opposing statement by
Microsoft, I hope we can agree to change the OCSP requirement from
mandatory to optional in the first version of the SMBRs.<br>
<br>
Thank you,<br>
Dimitris.<br>
<br>
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