Allow org admin to enforce "Continue with Microsoft" social login option for user authentication

Problem

Customers with multiple divisions using a common domain cannot enable SSO as this impacts all the users.
Some of these customers have a requirement that users should not use local Atlassian username/password. 
This can be met if we allow org admins to enforce the social login "Continue with Microsoft" option, but there is no option to enforce this log-in.

Suggestion

Allow org admins to enforce social login for users to authenticate.

Workaround

For now, there is no workaround.