How to check the number of site collection users using PowerShell? Solution: Go to the server side, and open PowerShell, then enter the command line below: $site=Get-SPSite("http://konglh2008r2") $web=$site.RootWeb $web.SiteUsers Note: Please replace the bold part with desired site collection address. Applies for: SharePoint 2013, SharePoint 2010, SharePoint 2007