Microsoft is introducing new authentication governance controls in Power Pages, now available in public preview. The update gives administrators greater control over authentication methods and identity providers, helping organisations manage website sign-in options in line with their security and governance requirements.

Here's what you need to know:

What's Changed?
Organisations need to balance flexible sign-in options with security and governance requirements across their citizen, customer, employee, and partner portals. Previously, administrators could only allow or block external authentication as a whole, but they can now manage individual protocols, OAuth 2.0 identity providers, and local authentication independently.
What's New?
Administrators now have more granular controls to manage the authentication options available across their Power Pages sites. These include protocol-level restrictions, individual OAuth 2.0 identity provider controls, and the ability to restrict local authentication.
Why Does This Matter?
These improvements give organisations greater oversight of authentication options while helping administrators enforce consistent security policies. They also support site-specific requirements and make restricted options visible to makers in Power Pages design studio.
How to Get Started
Administrators with the Power Platform Administrator or Dynamics 365 Administrator role can configure these controls through the Power Platform admin center. They can select an environment, manage authentication settings, specify the affected sites, and review the changes before confirming.
Important Considerations
All authentication options are allowed by default unless an administrator restricts them, and allowing an option does not automatically enable or configure it. Blocking an authentication method also affects existing users, so coordinate with site owners and ensure alternative sign-in methods are available before applying restrictions.

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