Microsoft Entra External Authentication Is Now Generally Available!
There’s a moment every identity engineer knows too well: you’re designing an access flow, everything looks clean on paper, and then someone says the words that derail the whole architecture— “We need to use our existing MFA provider.” Historically, that sentence meant pain. You either duct‑taped Custom Controls into Conditional Access, built brittle redirects, or told the business “no” and hoped they forgot. Finally, that tailspin is over. Microsoft has rolled out a new capability in Entra that changes the external authentication story entirely. Instead of relying on proprietary hooks or deprecated features, Entra now supports standards‑based external authentication using OpenID Connect . In plain English: you can plug in a third‑party identity or MFA provider, and Entra treats it like its own. Why This Matters More Than You Think Identity teams have been asking for this for years, and not because they enjoy wiring up extra systems. The real world is messy. Organizations merge. Unive...