@James Chan_110, Thanks for posting in Q&A. For your questions, I would say, currently, the Certificate Authority used in the SCEP Certificate Flow for Intune environment must be a Microsoft Active Directory Certificate Services Enterprise Certification Authority (CA) that runs on an Enterprise edition of Windows Server. A Standalone CA is not supported. Therefore, currently, there is no way to use a standalone CA with SCEP in Intune.
Thanks for your understanding.
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