User information are stored as user Profiles in SharePoint environment. You can import users from Active directory into SharePoint and map them into User Profile. The User Profile Service in SharePoint does that. It is managed by the following user profile jobs.

• User Profile Change Job
• User Profile Change Cleanup Job
• User Profile Incremental Synchronization
• User Profile to SharePoint Full Synchronization
• User Profile to SharePoint Quick Synchronization

Only Site-collection administrator can view the user information list.

The User Information List can be viewed via the browser by navigating to

1./_catalogs/users/simple.aspx

2. /_catalogs/users/detail.aspx 

People Picker and User Information List

Whenever you do search users using People picker, People pickers looks at the two locations

1.User Information List

2.Active Directory

Any users gets added to the hidden User Information list whenever they access the SharePoint site for the first time. Apart from that User Metadata is also stored such as email id, work phone, Picture of the user.

Do Check out this blog to

1. Remove user permissions in SharePoint 2013/2016 using powershell

2.Get external Sharing Settings in Office 365

3.Create Content Types in SharePoint 2013 using CSOM

4.How to Enable Versioning in Sharepoint list in Online using Powershell

Happy SharePointing 🙂