If you use Intune SCEP to generate and deliver user certificate, you need to review and update accordingly before July 16 your SCEP profile to use new required attributes for the certificate subject name:
- Given name – G={{GivenName}}
- Surname – SN={{SurName}}
This new requirement is following the enforcement new S/MIME baseline requirements for public certificate authorities from the Certification Authority Browser Forum (CA/Browser Forum).