Topic hub
SharePoint Permissions
How SharePoint Online authorization actually works: role definitions, role assignments, inheritance, SharePoint groups and the places where the admin UI hides what is really granted.
Guides in SharePoint Permissions
Start with How to Find Out Why a User Has Access to a SharePoint Site.
- SharePoint Permissions11 min read, intermediate
How to Find Out Why a User Has Access to a SharePoint Site
Trace direct, inherited and nested group access in SharePoint Online, from the role assignment on the resource down to the identity, using the admin UI, REST and PowerShell.