Delete SharePoint groups and exclude others using PowerShell

Question

I have to remove several unnecessary permission groups from multiple subsites, but there are some groups that I need to keep. How to delete permission groups and exclude others?

Answer 1

To delete SharePoint groups and exclude others using PowerShell

The following PowerShell script enables you to exclude some permission groups from being deleted

Add-PSSnapin Microsoft.SharePoint.PowerShell
$siteUrl = "https://rootSite/debug"
$site = Get-SPSite $siteUrl
$web = $site.RootWeb

#get all site groups 
$groups = $web.SiteGroups

#iterate through each group to be deleted or excluded 
for ($i = 0; $i -lt $groups.Count; $i++){

   try {

        $group = $groups[$i]
        $Gname = $group.Name

       $ExcludeItems = @(“Group 2”,”Group 3”,”Group 4")

     if($Gname -notin $ExcludeItems){

       #delete sharepoint group using powershell
       Write-Host "Deleting group:" $Gname -ForegroundColor Yellow
       $web.SiteGroups.Remove($Gname)
}
    }

catch {
        Write-Host "Error deleting group:" $group.Name -ForegroundColor Red
    }
}

$web.Dispose()
$site.Dispose()