Who are AUTHORITY\Authenticated Users in SharePoint?
Every user Account that can logon to your network! So, If you want all of your AD users to access a SharePoint site, Grant access to "NT AUTHORITY\Authenticated Users" to the relevant SharePoint group. 'NT Authority\Authenticated Users' can also be used to grant access to users from multiple domains of your network.
Adding NT Authority\Authenticated Users to SharePointIn SharePoint 2007, There was an easy way to add "NT AUTHORITY\Authenticated Users" by clicking "Add All Authenticated Users" link. But its removed in SharePoint 2010.
SharePoint 2010 "NT Authority\Authenticated Users" Missing
SharePoint 2010 "NT Authority\Authenticated Users" is not available from Address Book.
- Click Site Actions >> Site Permissions.
- Click Grant Permissions.
- In Select Users, enter "NT AUTHORITY\Authenticated Users"
- Select the relevant SharePoint group and Click "OK"
Like any other user account, you can delete "NT Authority\Authenticated Users" from SharePoint.
- Go to Site Actions
- Site Settings
- Click on "More..." from Quick Launch
- Select the "NT AUTHORITY\authenticated users" user
- Click on "Delete User from Site Collection" to disable "NT Authority\Authenticated Users" from SharePoint site collection.
How to add programmatically “every user” group to a Sharepoint Site
//Get the Reader Permission Level SPRoleDefinition readerRole = web.RoleDefinitions.GetByType(SPRoleType.Reader); SPUser allusers = web.EnsureUser("NT AUTHORITY\\Authenticated Users"); SPRoleAssignment spRoleAssignment = new SPRoleAssignment(allUsers); spRoleAssignment.RoleDefinitionBindings.Add(readerRole); web.RoleAssignments.Add(roleAssignment); web.Update();
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