Azure AD federation compatibility list
Azure Active Directory provides single-sign on and enhanced application access security for Microsoft 365 and other Microsoft Online services for hybrid and cloud-only implementations without requiring any third-party solution. Microsoft 365, like most of Microsoft’s Online services, is integrated with Azure Active Directory for directory services, authentication, and authorization. Azure Active Directory also provides single sign-on to thousands of SaaS applications and on-premises web applications. See the Azure Active Directory application gallery for supported SaaS applications.
If your organization uses a third-party federation solution, you can configure single sign-on for your on-premises Active Directory users with Microsoft Online services, such as Microsoft 365, provided the third-party federation solution is compatible with Azure Active Directory. For questions regarding compatibility, please contact your identity provider. If you would like to see a list of identity providers who have previously been tested for compatibility with Azure AD, by Microsoft, see Azure AD identity provider compatibility docs.
Microsoft no longer provides validation testing to independent identity providers for compatibility with Azure Active Directory. If you would like to test your product for interoperability please refer to these guidelines.