Why Word Templates Convert to Default Style on Co-author Open

When you share a Word template with colleagues and they open it in co-author mode, the document often loses its custom styles and reverts to the default Normal style. This happens because Word templates use attached template files that are not automatically available to every collaborator. This article explains why the style conversion occurs and provides steps to prevent it.

Why Word Templates Lose Custom Styles During Co-Authoring

A Word template file (.dotx or .dotm) stores custom styles, formatting, and macros. When you create a new document based on that template, the new document is linked to the template file. This link is called the attached template. While you work on your own copy of the document, Word reads the custom styles from the attached template file.

The problem arises during co-authoring. When multiple people open the same template file simultaneously, Word treats each person’s session as a separate document instance. The attached template path is stored locally on each user’s machine or in the original location. If a co-author does not have access to the exact same template file — for example, if it is stored on a local drive or a different SharePoint site — Word cannot find the custom styles. As a fallback, Word applies the default Normal style to all text.

Additionally, Word’s co-authoring feature is designed for documents, not templates. Opening a .dotx or .dotm file in co-author mode triggers a conversion: Word changes the file type to a regular document (.docx) and strips the template behavior. This conversion removes the link to the original template and resets styles to the default theme.

How Co-Authoring Changes Template Behavior

When a template is opened by two or more people at the same time, Word creates a temporary copy for each user. The temporary copy is a .docx file. All custom styles that were defined only in the original template are lost because the temporary copy does not reference the .dotx file. The result is that every paragraph appears in the Normal style, and your carefully designed headings, lists, and table styles vanish.

Steps to Keep Custom Styles When Co-Authoring Templates

Use the following methods to preserve custom styles when multiple people need to edit the same template.

Method 1: Store the Template in a Shared Location and Use Organizer

1. Move the template to a shared folder
   Upload the .dotx or .dotm file to a OneDrive or SharePoint folder that all co-authors can access. Each user must have at least read permission to the folder.
2. Open the template in Word
   Double-click the file from the shared location. Word opens it as a document, not a template.
3. Open the Organizer
   Press Alt + F11 to open the VBA editor, then press Ctrl + R to show the Project Explorer. Alternatively, go to Developer > Document Template > Organizer. If the Developer tab is not visible, right-click the ribbon and select Customize Ribbon, then check Developer in the right pane.
4. Copy styles from the template to the document
   In the Organizer dialog, click the Styles tab. On the left side, select the template file that contains your custom styles. On the right side, select the current document. Highlight the styles you want to preserve (for example, Heading 1, CustomBody, ListBullet) and click Copy. Click Yes when prompted to overwrite existing styles.
5. Save the document as a template again
   Go to File > Save As. Choose Word Template (.dotx) from the file type list. Save it back to the shared folder with a new name or overwrite the original.

Method 2: Embed Styles Directly Into the Document

1. Create a new document based on your template
   Double-click the .dotx file to create a new document. This document contains all the custom styles from the template.
2. Remove the template attachment
   Go to Developer > Document Template. In the Templates and Add-ins dialog, clear the check box labeled Automatically update document styles. Click OK.
3. Save the document as a regular .docx file
   Go to File > Save As. Choose Word Document (.docx). Save it to the shared folder. This file now contains all the styles internally and does not rely on an external template.
4. Share the .docx file for co-authoring
   All co-authors can open the .docx file simultaneously. The styles remain intact because they are stored within the file itself.

Method 3: Open the Template in Read-Only Mode

1. Right-click the template file in OneDrive or SharePoint
   Select Open > Open in Word. Do not double-click the file.
2. Enable editing
   If a yellow bar appears saying Protected View, click Enable Editing. Word opens the file as a read-only document.
3. Make your changes and save
   Edit the styles as needed. When you save, Word prompts you to save a copy. Choose to save as a .dotx file in the same shared folder. Other co-authors must close and reopen the file to see changes.

If Styles Still Reset After Co-Authoring

Word converts the template to a document automatically

When you open a .dotx file in co-author mode, Word may silently convert it to a .docx file. To verify, check the file extension in the title bar. If it shows .docx, the template link is broken. Use Method 2 above to embed styles permanently.

Co-authors see Normal style only

If one collaborator sees correct styles but others do not, the template file is not accessible to everyone. Confirm that all users have the same shared folder location mapped in Word. Go to File > Options > Trust Center > Trust Center Settings > Trusted Locations and add the shared folder path if missing.

Custom styles do not appear in the Styles pane

Open the Styles pane by pressing Alt + Ctrl + Shift + S. Click Options at the bottom. Under Select styles to show, choose All styles. If the custom styles still do not appear, use the Organizer method to re-copy them from the original template file.

Template Behavior Comparison: Co-Authoring vs Local Editing

Item	Co-Authoring Mode	Local Editing Mode
File type opened	Converted to .docx	Opens as .dotx
Custom styles source	Must be embedded in file	Loaded from attached template
Style loss risk	High if template not shared	Low if template is available
Recommended practice	Embed styles or share .docx	Use Organizer to copy styles

Understanding this difference helps you choose the right workflow. For team projects that require live editing, embed styles directly into the document. For individual work or single-user template updates, keep the .dotx file in a local folder and use the Organizer.

You can now prevent Word templates from converting to default styles during co-authoring by embedding styles or ensuring the template file is accessible to all collaborators. Next time you share a template, use the Organizer to copy styles into the document or save the file as a .docx with embedded formatting. For advanced control, disable Automatically update document styles in the Templates and Add-ins dialog to lock your custom styles permanently.