While on other Stack Exchange sites like Game Development and Code Review they recognize if I am logged in to Stack Overflow or Stack Exchange and after refresh request from page I am logged in there too. This autologin feature does not happen on Super User.

Even if I go to the login page, it does not offer me automaticaly to login with my connected SE account.

I know I am registered on Super User as I even asked a question there.


Super User is on its own domain name, superuser.com, not under *.stackexchange.com, therefore the current auto-login does not apply.

What this means right now:

  1. When you log into any Q&A site on the stackexchange.com domain, you will be automatically logged into all other Q&A sites on the stackexchange.com domain + stackexchange.com itself.

    • Area 51 is excluded from this.
  2. stackoverflow.com, superuser.com, and other Q&A sites with their own domains will still use the old flow.

Source: Global auth is dead! Long live universal login

Stage 3 will "make cross-domain experience smoother".

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