Get a list of "Other organizations you belong to" from all users

This is truly a mystery. Individual users can easily review the "other organizations" but as admin I cannot find this information anywhere! We have been reviewing our own external guest users which made us think of how our users must exist the same way in other tenants. Given that we can see some private information about our external guests i.e. IP address makes me think that admins urgently need this kind of insight into how their users are connecting to other tenants.