Hello,
Can we restrict Sign-In of users to specific tenant / domain only? I.e. users that try to use different domain than the one used for their enterprise will not be able to sign-in to ACO.

For example, in Microsoft there is an option to restrict login of the users to specific Tenant/domain using https://login.microsoftonline.com/ || . Users who try to use email address with different domain than allowed will fail to login.
Thanks.