Subscribe "Alert" all users to a particular discussion board list

Dear all.

We currently have an all staff email address in which are looking to replace with discussion boards.

Problem is every user would have to subscribe manually.

Is there a method in PowerShell or similar that I may subscribe all users to a particular list?

Thanks for reading.
Michael ArtheyAsked:
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MontoyaProcess Improvement MgrCommented:
you can subscribe all users that you want, as long as you have rights. When you create an alert, it shows you a box to input email addresses or groups.. but a DL in there and you're set.
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Jayaraja JayaramanSharepoint Architect ConsultantCommented:
try the below


get all web users:
function GetSPWebUsers($SiteCollectionURL)
{
    [System.Reflection.Assembly]::LoadWithPartialName("Microsoft.SharePoint") > $null
    $site = new-object Microsoft.SharePoint.SPSite($SiteCollectionURL)
    $web = $site.openweb()
    $siteUsers = $web.SiteUsers
 
    foreach($user in $siteUsers)
    {        
        Write-Host " ------------------------------------- " 
        Write-Host "Site Collection URL:", $SiteCollectionURL
        if($user.IsSiteAdmin -eq $true)
        {
            Write-Host "ADMIN: ", $user.LoginName
$list=$web.Lists.TryGetList("Shared Documents")
$user = $web.EnsureUser($user.LoginName )
$newAlert = $user.Alerts.Add()
$newAlert.Title = "My Custom Alert"
$newAlert.AlertType=[Microsoft.SharePoint.SPAlertType]::List
$newAlert.List = $list
$newAlert.DeliveryChannels = [Microsoft.SharePoint.SPAlertDeliveryChannels]::Email
$newAlert.EventType = [Microsoft.SharePoint.SPEventType]::Add
$newAlert.AlertFrequency = [Microsoft.SharePoint.SPAlertFrequency]::Immediate
$newAlert.Update()
        }
        else
        {
            Write-Host "USER: ", $user.LoginName
$list=$web.Lists.TryGetList("Shared Documents")
$user = $web.EnsureUser($user.LoginName )
$newAlert = $user.Alerts.Add()
$newAlert.Title = "My Custom Alert"
$newAlert.AlertType=[Microsoft.SharePoint.SPAlertType]::List
$newAlert.List = $list
$newAlert.DeliveryChannels = [Microsoft.SharePoint.SPAlertDeliveryChannels]::Email
$newAlert.EventType = [Microsoft.SharePoint.SPEventType]::Add
$newAlert.AlertFrequency = [Microsoft.SharePoint.SPAlertFrequency]::Immediate
$newAlert.Update()
        }
        Write-Host " ------------------------------------- " 
    }    
    $web.Dispose()
    $site.Dispose()
}
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