Master WS-Federation for hybrid identity. Learn how to bridge legacy ASP.NET apps with modern Entra ID and OIDC using the .NET 10 Passive Requestor Profile.

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A practical guide to implementing WS-Federation authentication in .NET 10 web applications, aimed at developers maintaining legacy ASP.NET systems that need to integrate with modern identity providers like Microsoft Entra ID. Covers the Passive Requestor Profile flow step-by-step, maps WS-Federation concepts to their OIDC equivalents, provides working Program.cs configuration code, and details debugging techniques for common failures like the infinite redirect loop. Also covers modernization exit strategies including running OIDC and WS-Federation side-by-side and using identity proxies to avoid code rewrites.

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