By default, in OneDrive a user with **Edit permissions on content can in turn (re)share it to other people**, who can in turn re-share it to a third person...
By default, in SharePoint, a user with **Edit permissions on content can in turn (re)share it to other people**, who can in turn re-share it to a third person...
In the case of long-term consulting or outsourcing assignments (e.g. IT support), it is not uncommon to give an Office 365 user account to allow to communicate and collaborate in the course of their duties.
Although the primary use of Information Barriers is for communication in Teams, it is possible to extend the coverage to SharePoint Online. The applied segments depend on the context.