Here are the relevant lines from the Company Portal logs when using Intune MDM copyPlatformSSODeviceSigningKeyFromLoginManager [-100] Failed to copy CurrentDeviceSigningKey from LoginManager generateCertificateSigningRequestWithKeyFromLoginManager [-110] failed to copy User Device Signing key from loginManager registerDeviceForUserWithRequestParametersInternal [-110] Failed to generate valid certificate signing request! → MSAL: Platform SSO - device registration failed (-51100, "WPJ device registration failed")

I can confirm that I am experiencing the exact same issues as those being reported, but with Intune MDM as opposed to Jamf (macOS 26 no problems; physical macOS 27 no problems; but macOS 27 VMs all fail both MDM enrollment and Platform SSO registration)