SharePoint Document Issues

How to Prevent Co-Authoring and Enforce File Locks in SharePoint

Tauseeq Magsi Oct 16, 2026 868 views

Question details

The user wants to disable default co-authoring in SharePoint Online and enforce file locking so that only one editor can access a document at a time.

How to Prevent SharePoint Co-Authoring and Enforce File Locks

Product: SharePoint Online
Device & OS: not provided
Scenario: Managing team document collaboration where simultaneous co-authoring causes conflicts or violates workflow rules.
Observed behavior: SharePoint allows simultaneous co-authoring by default instead of the traditional shared-drive-style file locking.

Before you start

Ensure you have Site Owner or Full Control permissions for the SharePoint document library to modify its versioning and check-out settings.

Solution 1Recommended

Enable 'Require Check Out' in Document Library Settings

The standard method to prevent co-authoring in SharePoint is by configuring the library to force users to check out files before editing.

SharePoint Online is designed for collaborative co-authoring by default. To emulate traditional shared-drive locking, you must configure the library to require document check-out, which restricts editing access to one user at a time.

Access Library Settings

Navigate to your SharePoint site, open the target Document Library, click the gear icon (Settings) in the top right corner, and select 'Library settings'.

Open Versioning Settings

Click on 'More library settings', then select 'Versioning settings' under the General Settings section.

Enforce Check Out

Scroll to the bottom of the page, find the 'Require Check Out' section, select 'Yes' for 'Require documents to be checked out before they can be edited', and click 'OK'.

Enable 'Require Check Out' in Document Library Settings

File Locking Activated: Once enabled, users will be prompted to check out a document before making changes, preventing anyone else from editing it simultaneously.

Solution 2

Troubleshoot OneDrive Local Sync Folder File Locks

If you are accessing SharePoint files via File Explorer and locks behave inconsistently, verify your sync settings or escalate the issue to your administrator.

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Frequently Asked Questions

Does SharePoint lock files exactly like a traditional network drive?

No. SharePoint Online is built to support co-authoring by default, allowing multiple users to edit a file simultaneously. To mimic network drive locking, you must explicitly enable the 'Require Check Out' feature.

Why can others still edit a file even after I enabled 'Require Check Out'?

If other users already had the document open before the setting was applied, or if they are working offline with an out-of-date OneDrive sync, they might temporarily bypass the lock. Ensure all users close the document and refresh their synced folders.

How do I check out a file in a SharePoint library?

Hover your mouse over the document in the SharePoint library, click the three-dot menu icon (Show actions), select 'More', and then click 'Check out'.

What happens if someone forgets to check a document back in?

The document remains locked to everyone else. A SharePoint Site Administrator can override this by navigating to Library Settings, selecting 'Manage files which have no checked in version', and taking ownership to manually check it in.

Document & File Issues