Enterprise Managed Users can now be added directly to a repository in their enterprise as a collaborator, without becoming a member of the organization. These users function like outside collaborators, with a few differences:
1. Only user accounts from within the enterprise can be added to the repository. This means that users you want to collaborate with must still come from your linked identity provider (IDP).
2. EMU users can only be collaborators on repositories in their enterprise. EMU accounts cannot collaborate outside their enterprise.
3. Repo Collaborator invitations can only be sent by an EMU’s enterprise owner by default, while in non-EMU enterprises and organizations both enterprise and organization owners can manage outside collaborators.
Like outside collaborators – users do not have to SSO authorize their credentials in order to access repositories that they have been granted access to as a repository collaborators. This aligns to the current access model for internal repositories on GitHub.
You can try out repository collaborators by going to the repository policies section of your Enterprise settings and selecting which tiers of administrators are allowed to invite collaborators.
For more information about repository and outside collaborators, see “Roles in an organization“.