SharePoint - Delete all alerts!

 

Need to clean out all of the alerts from a development or testing system? Here's a PowerShell script to delete alerts. Run at your own risk... This will delete all alerts in all subsites in all site collections in all web applications (including My Sites).

Did I say… "Run at your own risk"?  PowerShell scripts like this one can do real harm on a production system and should only be run on a development or testing system. 

 

So… Run at your own risk… 

This should work in both SharePoint 2010 and 2013.

foreach ($site in Get-SPSite -Limit All) 
{ 
  "Site Collection $site" 
  foreach ($web in $site.allwebs)
  {
     "  Web $web"
     $c = $web.alerts.count
     "    Deleting $c alerts"
     for ($i=$c-1;$i -ge 0; $i--) { $web.alerts.delete($i) }
  }
}