i want to add about 30 internet callendars in outlook for apx 120 users .
I made this script:

$outlook = New-Object -ComObject Outlook.Application
$namespace = $outlook.GetNameSpace("MAPI")
$profile = $namespace.Folders.Item(1)
$calendars = $profile.Folders | Where-Object { $_.Name -eq "Calendar" }
$internetCalendars = $profile.Folders | Where-Object { $_.Name -eq "Internet Calendars" }
if ($internetCalendars -eq $null) {
    $internetCalendars = $profile.Folders.Add("Internet Calendars")
}
$calendarName = "test calendar"
$calendarLink = "https://outlook.xxxxxxxxxxxxxxxxxxxxxxxxxxxxxx/calendar.ics"
$internetCalendar = $internetCalendars.Folders.Add($calendarName)
$internetCalendar.WebCalUrl = $calendarLink
$internetCalendar.SendAndReceive'

But i have this error:
Exception setting “WebCalUrl”: “The property ‘WebCalUrl’ cannot be found on this object. Verify that the property exists and can be set.”
At line:20 char:1

• $internetCalendar.WebCalUrl = $calendarLink
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  <code> + CategoryInfo : NotSpecified: (:) [], SetValueInvocationException

  + FullyQualifiedErrorId : ExceptionWhenSetting

  </code>

  <code> + CategoryInfo : NotSpecified: (:) [], SetValueInvocationException + FullyQualifiedErrorId : ExceptionWhenSetting </code>

    + CategoryInfo          : NotSpecified: (:) [], SetValueInvocationException
    + FullyQualifiedErrorId : ExceptionWhenSetting