Allow all SharePoint users to access to site

Question

I created SharePoint site for all employees in my company (a few thousands people). For now every user, who is not added manually to site group cannot get access to site. He can of course send request to me but this is annoying.

My goal is to allow every SharePoint user from my company to get access to whole my site by default, without sending request and adding singular user to certain group. I am looking for someting like a group for 'Other Users', a container for every SharePoint user, who is not a member of any other group. I need also to give certain credentials for these 'Other Users' members (Contribute without permission to delete list items).

Do you know how can I attain it in SharePoint 2013 Online? I don't have access to Central Administration tools.

Answer 1

You can add "Everyone" that will give all user access. also when you give access you can assign appropriate permission on that, Should this help you let me know.

Or if you more concerned you can give NT AUTHORITY\Authenticated Users

Because The "Everyone" group is a superset of the authenticated users group. It includes the Authenticated Users group and the Guest account..

Reference: Authenticated Users Group vs the Everyone Group

Thread on Authenticated users