

Yeeeaahh… At my org our default security policy for all of our site collections prevents sharing outside of our domain, and requires managed devices to access our SharePoint.
To share things outside of our org via SharePoint, a site collection with a different security policy has to be created, and only admins can control the sharing. We can only share with people who have some sort of identity service that can federate with ours.
No user is granted above contribute access, and sharing is turned off. (People can share links, but they cannot change the permissions of an item to share it.).
Theoretically it’s possible that a SharePoint can be created that allows public access, but to my knowledge we do not do that.
OneDrive files cannot even be downloaded by external parties (although they can be viewed in the browser!), and Teams workspaces are also not accessible externally unless by special circumstance.
I would imagine the federal government is… well, hopefully at least as locked down as my work.









It can be pretty annoying. We wind up creating extranet sites or using other services. (We have some ftp-like file services that work for us.)