With SharePoint Online, are there any ways to find if a list/document library has item(s) with unique permissions using PowerShell without iterating through all the items in it.

When a list/library has item(s) with unique permission, the permission page - List(Library) Settings -> Permissions for this list (document library) - shows a message "Some items of this list may have unique permissions which are not controlled from this page."

I am wondering how the page is getting this information - I checked the definition of SPList (https://msdn.microsoft.com/en-us/library/microsoft.sharepoint.client.list_properties.aspx) but there do not seem to have a relevant property for this.

I have a PowerShell script with CSOM to collect various information associated with lists. If iterating through all the items in a list and check their permission, it would slow the script down considerably especially when a list contains a large number of items.


This is possible in PowerShell or SharePoint Server Object Model by using SPList method GetItemsWithUniquePermissions https://msdn.microsoft.com/en-us/library/ee572463.aspx



$web = Get-SPWeb("http://site_url")
$list = $web.Lists["list_title"]
$itemCount = $list.GetItemsWithUniquePermissions().Count

SharePoint Server Object Model

using(SPSite site = new SPSite("http://site_url"))
    using(SPWeb web = site.OpenWeb())
        SPList list = web.Lists["list_title"];
        int itemCount = list.GetItemsWithUniquePermissions().Count;
| improve this answer | |
  • Is the method available with SharePoint Online? I cannot find it in the documentation - msdn.microsoft.com/en-us/library/… – Jumpei Yamauchi Sep 2 '17 at 4:53
  • Sorry @JumpeiYamauchi, GetItemsWithUniquePermissions is available only on on-premises SharePoint server object model . Microsoft must be using server object model to display the message "Some items of this list may have unique permissions which are not controlled from this page." – Ahmad Zia Sep 3 '17 at 23:32

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