Microsoft has made Platform Single Sign-On (PSSO) during Automated Device Enrollment (ADE) generally available for macOS. The new EnableRegistrationDuringSetup setting in Microsoft Intune completes device registration and SSO configuration automatically during Setup Assistant — the initial macOS setup wizard — before the user ever reaches the desktop. This article explains what PSSO is, why the new setting matters, what you need to configure it, and what limitations to expect.

Source