
8fl8o (8fl8o) asked a question.
Just getting started and am looking to set up federation with the O365 domain(s). I understand that federation is all or nothing, but I want to test things out (and document!) the new login process before throwing real users at it. All existing users are members of multiple O365 domains (eg mycompany.com, mynewcompany.com, myoldcompany.com, etc) in addition to the .onmicrosoft.com domain. If I federate and only select the myoldcompany.com domain, does that mean that Jon.Smith@mycompany.com will not get redirected to Okta, but Jon.Smith@myoldcompany.com will?

Hi, @8fl8o (8fl8o)
Thank you for posting on our Community page!
Basically, the answer is yes, only the selected domains will get redirected for authentication.
You can find out more on this and how to configure multiple domains here:
Thank you for reaching out to our Community and have a great day!
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