Can anyone point out a blog or post of a single login for multiple domains?
For example, let's say I own asite.com and bsite.com.

I want a user who logins to asite.com to also be logged into bsite.com if they
visit that site. BSite.com is clearly a microsite of asite.com but we'd like
to continue to use that domain if the visitor is on that site instead of
redirecting them to keep login credentials

Thanks