I don't know if this helps anyone, but we had this issue - wanting to secure our WiFi for Azure AD joined machines, but not having a password etc. We achieved this by *loosely* following this guide : Intune: 802.1x Wi-Fi, NPS and user PKCS certificates | Katy's Tech Blog (katystech.blog) this helped us to set up the Intune Certificate Connector to issue internal CA certs to Intune/AAD devices. We then set our Meraki authentication to "Enterprise with Local Auth", allowing certificate authentication, uploaded our root CA cert... And it worked!
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