Unique List Items Detection

The Unique List Items Detection action, displays all list items for specified list that have unique permissions, that is, permissions not inherited from parent list.

By default permission inheritance cascades down from the top-level site in a site collection to sub sites, lists, libraries, list items and files. In SharePoint, there is a maximum number of unique security scopes that can be used for a list or a library, in SharePoint 2013, this number, known as security scope threshold, is 50,000. Although Microsoft recommends keeping the number of unique security scopes per list lower than this number.

Creating unique permissions on folder, list items and files can affect SharePoint performance. You may find that you are more likely to be affected by this, when users have created workflows that break inheritance at the item level. Therefore using this DeliverPoint action is useful in identifying where permission inheritance was stopped and different permissions assigned to list items and files. See Best practices for using fine-grained permissions.

To use the Unique Items action, complete the following steps:

1. Navigate to the list / library where you want to use the DeliverPoint action.
   
   
2. On the DeliverPoint Ribbon tab, click Unique Items in the List Permissions group.
   
   
   
   The Items with Unique Permissions page is displayed.
   
   
   
   Under the Title column, click the item link to display the properties of the item, where you can manage the permissions of the item.
   
   
3. To export the report, on the Commands Ribbon tab, click Export to Spreadsheet in the Reporting group. The Microsoft® Excel spreadsheet file name is of the format, Unique_Items_yyyymmdd.xls.
   

References

Best practices for using fine-grained permissions