In this blog, I would like to explain how to remove a user/users from all SharePoint Groups. Removing a user/users from all SharePoint Groups in a Site Collection would be a complex task to do manually.

This will remove the selected user/users from all SharePoint groups, libraries, lists and sub sites in the Site Collection.
Step 1: Open Powershell Window in your environment.

Step2: Copy and paste the code, given below. Run the code.
  1. $LoginName = "domain\loginname"
  2. $siteURL = "http://gowtham.sharepoint.com" #.
  4. Clear-Host
  5. $siteCount = 0
  6. [system.reflection.assembly]::loadwithpartialname("Microsoft.SharePoint")
  7. $site = new-object microsoft.sharepoint.spsite($siteURL)
  8. $webApp = $site.webapplication
  9. $allSites = $webApp.sites
  10. foreach ($site in $allSites)
  11. {
  13. $web = $site.openweb()
  14. $web.SiteUsers.Remove($LoginName)
  15. $web.Dispose()
  16. $siteCount++
  17. }
  18. $site.dispose()
  19. write-host "User Deleed" $siteCount "Site Collections."