Can I get list of 'assign Permission specific users and group' programmatically ?

Question

Can I get the contents of the red box in the picture below programmatically (C# or C++)?
What should I do if I can?

I use the following code but i can't get information

----- my code (roughly) -----
// I'm using MIP SDK(Microsoft Information Protection)
var handler = Task.Run(async () => await fileEngine.CreateFileHandlerAsync(filePath, filePath, IsAuditDiscoveryEnabled)).Result;
var pd = handler.Protection.ProtectionDescriptor;
var ur = pd.UserRights; // ===> !!!

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'Edit sensitivity label' at 'Azure Portal'

Answer 1

There isn't a group that specifically contains all authenticated users, but you can create a group containing all users within a tenant using a membership rule. https://learn.microsoft.com/en-us/azure/active-directory/enterprise-users/groups-dynamic-membership

There aren't any official samples for this that I'm aware of, but there is actually a C# example of querying all users in a tenant this similar thread.

Let me know if this is what you are looking for and if I understood the ask correctly. I would be happy to discuss this further.