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PowerShell script to get all SharePoint users at Farm-Web Application-Site Collection-Web levels:
The list is available in SharePoint 2013, SharePoint 2016, and guess in SharePoint 2019 and SharePoint Online also. How SharePoint User Information List gets data? As soon as you add/grant access to a user at subsite/ Site Collection level SharePoint added a new entry in this list with the latest information of that user from AD.
How to add users to the hidden list in SharePoint?
In SharePoint as soon as you add a user with some permission the user will be added to a hidden list http://sharepoint13:12345/_catalogs/users/simple.aspx. That is why Microsoft is suggesting to add users from AD groups. I have implemented the below PowerShell solution to clean the non-existed users across the SharePoint site collections.
How to access user information list in UI?
How to access User Information List in UI? The SharePoint User Information List can be accessed via the browser by navigating to “/_catalogs/users/simple.aspx” from your site. Ex: http://contoso.com/_catalogs/users/simple.aspx. You can see a screenshot of SharePoint Online user information list for on of my SharePoint Online site.
The supported limit for subsites per site collection is 250,000 and it’s the same number of subsites per farm. The recommended subsites per site collection are 2000 subsites. It’s recommended to deploy multiple site collections If you are planning to create more than 2000 web sites per site collection.
1 Open Central Administration, Click on “Application Management”. 2 Below “Site Collection”, click on “View All Site Collections”. 3 You can select which web application you would like to view its site collections as shown below.
How many site collections can I create per farm?
It’s recommended to deploy multiple site collections If you are planning to create more than 2000 web sites per site collection. In this case, the max site collections number that you can create per farm is 125 site collections. (125 site collection * 2000 web site) = 250,000 subsites and this the supported number of subsites per farm.