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Office Settings & Configuration

How to Stop Word 365 from Saving Documents as ODT by Default

Anum MushtaqAnum Mushtaq Oct 15, 2026 870 views

Question details

Users need to change the default save format in Word 365 from OpenDocument Text (.odt) back to Word Document (.docx) and prevent it from automatically changing across enterprise environments.

How to Stop Word 365 from Saving Documents as ODT by Default
Product
Word 365
Device & OS
not provided
Scenario
Setting up new enterprise devices via Autopilot or SCCM, or existing users experiencing unexpected settings changes.
Observed behavior
Word 365 automatically defaults to saving new documents in the .odt format instead of the standard .docx format without any user initiation.
Before you start

Ensure you have administrative privileges if you plan to investigate and deploy fixes across an enterprise environment using Group Policy or Endpoint Manager. For individual fixes, simply having Word 365 open is sufficient.

Solution 1Recommended

Change Default Save Format in Word Options

The quickest way to restore the .docx format for individual users experiencing the .odt default issue.

1
Open Word Options

Launch Word 365, click on 'File' in the top-left corner of the ribbon, and select 'Options' located at the bottom of the left sidebar.

2
Navigate to Save Settings

In the Word Options dialog box, click on 'Save' in the left-hand pane to access document saving preferences.

3
Modify the Default Format

Locate the 'Save files in this format' dropdown menu and select 'Word Document (*.docx)' from the list of available formats.

4
Apply and Restart

Click 'OK' to save your changes, then completely close and restart Word 365 for the new default format to take effect.

Change Default Save Format in Word Options
Format Restored: All new documents created by this user will now automatically save in the standard .docx format.
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Frequently Asked Questions

Why did my Word 365 default save format suddenly change to .odt?

This typically happens due to an enterprise policy update, a glitch in Microsoft Endpoint Configuration Manager (SCCM), or when a new device is provisioned via Autopilot with specific regional settings that default to OpenDocument formats.

Can I force .docx as the default format for all users in my organization?

Yes, IT administrators can use Group Policy Objects (GPO) or Microsoft Intune configuration profiles to enforce 'Word Document (*.docx)' as the mandatory default save format across the entire enterprise.

Does saving a file as .odt lose any formatting compared to .docx?

Yes, OpenDocument Text (.odt) may not support certain advanced formatting features, macros, or specific layout options native to Microsoft Word, which is why restoring the .docx default is crucial to prevent document formatting loss.

Are there any registry keys to fix the default save format in Word?

You can modify the registry key under HKEY_CURRENT_USER\Software\Policies\Microsoft\office\16.0\word\options by setting the 'defaultformat' string or DWORD value, but utilizing standard Group Policy management is highly recommended for enterprise environments.