How to Operate SharePoint User Alerts with PowerShell

## To enable alerts for Web application

$SPwebapp=Get-SPWebApplication "http://SharePointSite.com"

$SPwebapp.AlertsEnabled = $true

$SPwebapp.Update()

# To Disable alerts for a Web application

$SPwebapp.AlertsEnabled = $false

$SPwebapp.Update()

##### Create an New alert for an user #########

$SPsite = Get-SPSite "http://SharePointSite.com"

$SPweb=$SPsite.Rootweb

$SPlist=$SPweb.lists["Shared documents"]

$SPuser = $SPweb.EnsureUser(‘Domain\Salaudeen‘)

$SPnewAlert = $SPuser.Alerts.Add()

$SPnewAlert.Title = "My Custom Alert"

$SPnewAlert.AlertType=[Microsoft.SharePoint.SPAlertType]::List

$SPnewAlert.List = $SPlist

$SPnewAlert.DeliveryChannels = [Microsoft.SharePoint.SPAlertDeliveryChannels]::Email

$SPnewAlert.EventType = [Microsoft.SharePoint.SPEventType]::Add

$SPnewAlert.AlertFrequency = [Microsoft.SharePoint.SPAlertFrequency]::Immediate

$SPnewAlert.Update()

$SPweb.Dispose()

$SPSite.Dispose()

##### Display All alerts for a Particular List ########

$SPWeb = Get-SPWeb "http://SharePointSite.com"

#Relative URL of list/document library. For lists "Lists/Tasks"

$SPListURL = "Shared Documents" 

foreach($alert in $SPWeb.Alerts)

{

    if($alert.ListUrl -eq $SPListUrl)

    {           

            "User Name    - " + $alert.User.Name

            "Title        - " + $alert.Title

            "Frequency    - " + $alert.AlertFrequency

            "Delivery Via - " + $alert.DeliveryChannels

            "Change Type  - " + $alert.eventtype

            Write-Host "=================================="

    }

}

$SPweb.Dispose()

##### Set alerts for all users in the SharePoint Group ######

$SPweb = Get-SPWeb "http://SharePointSite.com"

$SPgroup = $SPweb.Groups["SharePoint Owners"]

$SPlist = $SPweb.Lists["Shared Documents"]

foreach ($SPuser in $SPgroup.Users){

     $alert = $SPuser.Alerts.Add()

     $alert.Title = "My Alert"

     $alert.AlertType = [Microsoft.SharePoint.SPAlertType]::List

     $alert.List = $SPlist

     $alert.DeliveryChannels = [Microsoft.SharePoint.SPAlertDeliveryChannels]::Email

     $alert.EventType = [Microsoft.SharePoint.SPEventType]::Add

     $alert.AlertFrequency = [Microsoft.SharePoint.SPAlertFrequency]::Immediate

     $alert.Update()

}

$SPweb.Dispose()

#####  Making Changes in Existing Alerts ########

$SPsite = Get-SPSite "http://SharePointSite.com"

$SPweb=$SPsite.RootWeb

$SPuser=$SPweb.EnsureUser(‘Domain\Salaudeen‘)

$SPalertCollection=$SPuser.Alerts

foreach($alert in $SPalertCollection)

{

  $alert.AlertFrequency = [Microsoft.SharePoint.SPAlertFrequency]::Daily

  $alert.Update()

} 

##### Get alerts for a particular user #########

$SPsite = Get-SPSite "http://SharePointSite.com"

$SPweb=$SPsite.RootWeb

$SPuser=$SPweb.EnsureUser(‘Domain\Salaudeen‘)

$SPalertCollection=$SPuser.Alerts

foreach($alert in $SPalertCollection)

{

 write-host -f Green $alert.Title

}

##### Get the Alerts of Entire Site collection #####

$SPsiteCollection = Get-SPSite "http://SharePointSite.com"


# Iterate through all Webs in the Site Collection

foreach($SPweb in $SPsiteCollection.AllWebs) 

 {

   foreach($alert in $SPweb.Alerts)

    {

        Write-Host "Alerts List :" $alert.ListUrl

    Write-Host "Alerts Title :" $alert.title

    write-host "Subscribed User: " $alert.user

     }

 }

##### Delete All alerts for a specific List #####

$SPweb = Get-SPWeb "http://SharePointSite.com"

$SPlist = $SPweb.lists["Shared Documents"]

$IDS = ""

foreach($alert in $spweb.alerts)

{

    if($alert.ListID -eq $SPlist.ID)

    {

    $IDS += $alert.ID.tostring() + "|"

    }

    write-host -nonewline "*"

}

write-host "deleting..."

foreach($s in $IDS.Split("|"))

{

write-host -nonewline "*"

$spweb.alerts.delete([GUID]$s)

}

##### Remove all alerts for specific user from a Web Application #####

$SPwebApp = Get-SPWebApplication "http://SharePointSite.com"

$SpecificUser = "Domain\Salaudeen"

foreach ($SPsite in $SPwebApp.Sites)

    {

        # get the collection of webs

        foreach($SPweb in $SPsite.AllWebs)

        {

            $alerts = $SPweb.Alerts

            # if 1 or more alerts for a particular user, Make a note of them by copying their ID to an Array

            if ($alerts.Count -gt 0)

            {

                $myalerts = @()

                foreach ($alert in $alerts)

                {

                if ($alert.User -like $SpecificUser)

                {

                    $myalerts += $alert

                }

            }

            ### now we have alerts for this site, we can delete them

            foreach ($alertdel in $myalerts)

            {

                $alerts.Delete($alertdel.ID)

                write-host $alertdel.ID

            }

        }

    }

}

$SPweb.Alerts| foreach-object {$web.Alerts.Delete($_.Id)}

#For for e.g. http://SharePoint.com/site/Assets"
$SPweb.Alerts| where-object {$_.ListUrl -like "Assets"} 

# ? is the alias for where-object cmdlet
$web.Alerts | ? {$_.UserId -like "Domain\Salaudeen"}

$site.AllWebs | select -expand Alerts | ? {$_.UserId -like "Domain\Salaudeen"

$site = Get-SPSite "http://2013portal"

$alertResultsCollection = @()

foreach ($web in $site.AllWebs) {

foreach ($alert in $web.Alerts){

$alertURL = $web.URL + "/" + $alert.ListUrl

$alertResult = New-Object PSObject

$alertResult |Add-Member -type NoteProperty -name "WebUrl" -Value $web.Url

$alertResult | Add-Member -type NoteProperty -name "ListURL" -value $alertURL

$alertResult | Add-Member -type NoteProperty -name "AlertTitle" -value $alert.Title

$alertResult | Add-Member -type NoteProperty -name "ListUrl" -value $alert.ListUrl

$alertResult | Add-Member -type NoteProperty -name "List" -value $alert.List

$alertResult | Add-Member -type NoteProperty -name "DeliveryChannel" -value $alert.DeliveryChannels

$alertResult | Add-Member -type NoteProperty -name "AlertType" -value $alert.AlertType

$alertResult | Add-Member -type NoteProperty -name "EventType" -value $alert.EventType

$alertResult | Add-Member -type NoteProperty -name "Frequency" -value $alert.AlertFrequency

$alertResult | Add-Member -type NoteProperty -name "AlertTime" -value $alert.AlertTime

$alertResult | Add-Member -type NoteProperty -name "SubscribedUser" -value $alert.User

$alertResultsCollection += $alertResult

}

}

$site.Dispose()

$alertResultsCollection

#Export to CSV

$alertResultsCollection | Export-CSV C:\Users\sp2013_farm_admin\Desktop\Alerts.csv

Import-Csv C:\Users\sp2013_farm_admin\Desktop\Alerts.csv |ForEach-Object{

$webUrl=$_.WebUrl

$listTitle=$_.List

$alertTitle=$_.AlertTitle

$subscribedUser=$_.SubscribedUser

$alertType=$_.AlertType

$deliveryChannel=$_.DeliveryChannel

$eventType=$_.EventType

$frequency=$_.Frequency

 

$web=Get-SPWeb $webUrl

$list=$web.Lists.TryGetList($listTitle)

$user = $web.EnsureUser($subscribedUser)

$newAlert = $user.Alerts.Add()

$newAlert.Title = $alertTitle

$newAlert.AlertType=[Microsoft.SharePoint.SPAlertType]::$alertType

$newAlert.List = $list

$newAlert.DeliveryChannels = [Microsoft.SharePoint.SPAlertDeliveryChannels]::$deliveryChannel

$newAlert.EventType = [Microsoft.SharePoint.SPEventType]::$eventType

$newAlert.AlertFrequency = [Microsoft.SharePoint.SPAlertFrequency]::$frequency

if($frequency -ne "Immediate"){

$AlertTime=$_.AlertTime

$newAlert.AlertTime=$AlertTime

}

$newAlert.Update()

}