When multiple people work on the same Word document, you may want to allow changes only in certain parts while keeping the rest locked. The built-in Restrict Editing feature supports this, but co-authoring in real time adds complexity. If you apply section-level restrictions before sharing a document via OneDrive or SharePoint, each collaborator can edit only their assigned sections. This article explains how to set up section-specific editing restrictions that remain active during co-authoring sessions.
Key Takeaways: Restrict Editing by Section in Word Co-Authoring
- Review > Restrict Editing > Editing restrictions > Allow only this type of editing in the document: Enables section-based restrictions that work during co-authoring when the document is stored in OneDrive or SharePoint.
- Select Sections dialog (under Exceptions in Restrict Editing): Lets you assign editing rights to specific sections and specific users or groups before sharing.
- File > Info > Protect Document > Restrict Access by People: Alternative method using Information Rights Management (IRM) for finer control over user permissions per section.
How Restrict Editing Works With Co-Authoring
Word’s Restrict Editing feature allows you to lock formatting, require tracked changes, or permit editing only in selected sections. When co-authoring is enabled — meaning the document is saved to OneDrive, OneDrive for Business, or SharePoint — these restrictions remain active as long as the document is opened in Word for the web or the desktop app. The key prerequisite is that the document must be in the modern .docx format and stored in a location that supports co-authoring. Co-authors must have edit permissions at the file level (set in the cloud storage service) before section-level restrictions can be applied.
The restriction works by dividing the document into sections using section breaks. Each section can then be assigned a different editing permission. For example, you can make Section 1 editable by User A and Section 2 editable by User B while the rest of the document is read-only. Users who are not listed in the exceptions cannot modify any part of the document. The restrictions are enforced when the document is saved and synced; co-authors see a lock icon on non-editable sections.
Steps to Restrict Editing to Specific Sections for Co-Authors
Before you begin, insert section breaks in your document to separate the areas you want to control. Go to Layout > Breaks and choose Next Page, Continuous, or another section break type. Each section will appear in the Select Sections dialog later.
- Open the Restrict Editing pane
Click the Review tab, then click Restrict Editing in the Protect group. The Restrict Editing pane opens on the right side of the window. - Enable editing restrictions
In the pane, check the box under 2. Editing restrictions: Allow only this type of editing in the document. From the dropdown list, select No changes (Read only). This makes the entire document read-only by default. - Add exceptions for specific sections
Under 3. Start enforcement, click the Exceptions button. In the Exceptions dialog, click the Select Sections button. A list of all sections in the document appears. Check the box next to each section you want to allow editing for. For each selected section, you must assign users or groups: click the Add button under Groups or Individuals, type the email address or group name, and press Enter. Repeat for each section. Click OK to close. - Start enforcement
Back in the Restrict Editing pane, click Yes, Start Enforcing Protection. A dialog asks for a password. Enter a password (optional but recommended) and confirm it. Click OK. The restrictions are now active. - Save and share the document
Save the document to a co-authoring location such as OneDrive or SharePoint. Share the file with the users you added as exceptions. When each co-author opens the document, they can edit only the sections assigned to them. All other sections appear with a lock icon and are read-only.
Alternative Method: Information Rights Management (IRM)
If your organization uses Azure Information Protection, you can apply section-level restrictions through IRM. Go to File > Info > Protect Document > Restrict Access by People. Choose Restricted Access or a custom policy. In the permission dialog, you can set read and change permissions per user. However, IRM does not offer a section-level UI; you must first apply Restrict Editing as described above, then add IRM on top to limit which users can edit the entire document. This method is more complex and is best used when you need to revoke access remotely.
If Co-Authors Cannot Edit Their Assigned Sections
Even when restrictions are correctly set, co-authors may encounter problems. Below are common issues and how to resolve them.
Co-Author Sees a Lock on Every Section
The user was not added to the exceptions list for any section. Open the document, go to Review > Restrict Editing, click Stop Protection (if password-protected), then click Exceptions > Select Sections and verify that the user’s email appears under the correct section. Re-enforce protection and re-share the file.
Restrictions Do Not Sync in Real Time
Co-authoring restrictions are enforced when the document is saved and synced. If two co-authors edit the same section simultaneously, the second save may overwrite the first. To prevent this, ensure each section is assigned to only one user. Use section breaks to create small, single-user areas.
Word for the Web Ignores Section Restrictions
Word for the web supports Restrict Editing only when the document is opened in the desktop app. Co-authors using the browser version will see a message that editing is restricted, but they cannot edit any section — even those assigned to them. Instruct all co-authors to open the document in the Word desktop app (Windows or Mac) for full section-level editing.
Restrict Editing in Desktop vs Word for the Web
| Item | Word Desktop (Windows/Mac) | Word for the Web |
|---|---|---|
| Section-level editing restrictions | Full support with Exceptions dialog | Not supported; entire document becomes read-only |
| Real-time co-authoring | Works with restrictions enforced on save | Works but ignores section exceptions |
| Password enforcement | Supported | Not supported; password dialog does not appear |
| Adding exceptions per section | Available in Restrict Editing pane | Not available |
| Best use case | Team documents with multiple authors per section | Read-only review for all users |
You can now restrict editing to specific sections in a co-authored Word document. Start by inserting section breaks, then apply the Restrict Editing feature with exceptions for each section and its assigned users. Save the document to OneDrive or SharePoint and share it with the correct permissions. For advanced control, combine Restrict Editing with IRM policies. Remember that co-authors must use the desktop app to edit their assigned sections; Word for the web will show the entire document as read-only.