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Home/ Questions/Q 1059479
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Editorial Team
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Editorial Team
Asked: May 16, 20262026-05-16T18:10:43+00:00 2026-05-16T18:10:43+00:00

How does Stack Overflow’s SSO work? … whatever it is they are doing it

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How does Stack Overflow’s SSO work? … whatever it is they are doing it seems to work for all sites in the network.

I’d like to learn what Stack is doing so I can see if it’s possible to get a similar registration scheme between http://perfmon.com and http://eventvwr.com under ADFS. I understand that SAML and OpenID are different animals, but the concept of transparent registration should be the same.

Q: How does Stackoverflow “federate” with the other sites such as serverfault?

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  1. Editorial Team
    Editorial Team
    2026-05-16T18:10:44+00:00Added an answer on May 16, 2026 at 6:10 pm

    OpenID, One Year Later on SO blog explains how do they solve the problem.

    Also, there is a post on the new Global Login Mechanism on the SO blog.

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