Permission & Access Issues

Fix SharePoint Folder Cannot Be Shared Due to Too Many Unique Permissions

Maira Mehtab Sep 20, 2026 868 views

Question details

The user is unable to share a folder in SharePoint Online due to an error indicating that the folder's structure contains an excessive number of unique permissions.

Product: SharePoint Online
Device & OS: not provided
Scenario: Attempting to share a parent folder that contains numerous files and subfolders with customized, item-level access rights.
Observed behavior: SharePoint blocks the sharing action, displaying an error message stating that the folder cannot be shared because there are too many unique permissions.

Before you start

Ensure you have Site Owner or Full Control permissions for the SharePoint site, as you will need administrative rights to create new document libraries and modify folder permissions.

Solution 1Recommended

Reorganize Content into New Document Libraries

Distribute your files and subfolders across multiple document libraries to drastically reduce the permission complexity within a single structure.

SharePoint imposes a strict limit on the number of unique permissions allowed per list or document library to maintain system performance. When this limit is exceeded, sharing parent folders becomes blocked.

Instead of maintaining thousands of item-level unique permissions in one place, reorganizing your folder structure into separate document libraries is the most effective and sustainable resolution.

Create a new Document Library

Navigate to your SharePoint site homepage, click on 'New' in the top command bar, and select 'Document library' from the dropdown menu.

Name the new library

Enter a descriptive name for the new library that reflects the specific department, project, or permission group, then click 'Create'.

Move subfolders and files

Navigate back to your original document library, select the subfolders you wish to relocate, click 'Move to' in the top command bar, and choose the newly created document library as the destination.

Share the new parent folders

Once the files are moved, apply the necessary permissions to the parent folder or the entire new document library, and share it directly rather than setting individual file permissions.

SharePoint Permission Limits: While SharePoint theoretically supports up to 50,000 unique permissions per list or library, Microsoft strongly recommends keeping this number below 5,000 to avoid severe performance degradation and sharing errors.

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Frequently Asked Questions

What exactly is the unique permission limit in SharePoint Online?

SharePoint Online has a hard threshold of 50,000 unique permissions per list or document library. However, to prevent access errors and slow load times, Microsoft advises maintaining fewer than 5,000 unique permissions.

How can I check how many unique permissions a SharePoint library currently has?

SharePoint does not provide a native, visible counter for unique permissions on the front end. If you receive the 'too many unique permissions' error, it confirms you have surpassed the operational threshold for that specific structure, and reorganization is required.

Can I fix this by removing unique permissions instead of moving files?

Yes. If the item-level unique permissions are no longer necessary, you can go to the advanced permission settings of the folder and select 'Delete unique permissions'. This forces the files to inherit permissions from the parent folder, drastically reducing your unique permission count.

Why is item-level permission generally not recommended in SharePoint?

Assigning permissions to individual files or deep subfolders creates a highly fragmented security structure. This is not only difficult for administrators to track and audit, but it also heavily taxes server performance during search queries and sharing actions.

Document & File Issues