Office Apps Crashing

How to Fix Outlook Closing and Not Saving Entries

Emma Brown Sep 29, 2026 868 views

Question details

The user needs to resolve an issue where Microsoft Outlook stops responding, closes on its own, and fails to save new entries upon restarting.

How to Fix Outlook Closing and Not Saving Entries

Product: Microsoft Outlook
Device & OS: not provided
Scenario: Attempting to use Microsoft Outlook for managing emails or calendar entries when the application suddenly becomes unresponsive.
Observed behavior: Outlook unexpectedly stops responding, closes automatically, and does not save any recent entries or drafts after the application is reopened.

Before you start

Ensure you have saved any work in other open applications and have your Microsoft account credentials ready before restarting the application.

Solution 1Recommended

Run Outlook in Safe Mode and Disable Problematic Add-ins

Use Safe Mode to launch Outlook without any custom add-ins or extensions. This helps determine if a third-party startup component is causing the crashes.

Often, unexpected crashes and saving failures in Microsoft Outlook are triggered by outdated, corrupted, or conflicting add-ins. Booting the application in Safe Mode forces it to run with only essential components.

If the program functions normally in Safe Mode, you can be certain that an add-in is the culprit. You will then need to isolate and disable it in the normal operating mode.

Launch Outlook in Safe Mode

Open the Windows Start menu, type `Outlook.exe /safe` into the search bar, and press the Enter key to start Microsoft Outlook in Safe Mode.

Test Application Stability

Navigate through your inbox, create a test email, or add a calendar entry. Check if Outlook functions smoothly and successfully saves your new entries without crashing.

Access Add-in Settings

If Outlook works perfectly in Safe Mode, restart the application normally. Go to the 'File' tab in the top left corner, click on 'Options', and select 'Add-ins' from the left-hand menu.

Disable Suspicious Add-ins

At the bottom of the window, ensure 'COM Add-ins' is selected in the Manage dropdown and click 'Go'. Uncheck the boxes next to recently installed or suspicious add-ins to disable them, then click 'OK'.

Run Outlook in Safe Mode and Disable Problematic Add-ins

Isolating the Exact Add-in: To find the exact add-in causing the problem, disable all of them first. Then, enable them one by one, restarting Outlook each time, until the crashing behavior returns.

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Frequently Asked Questions

Will I lose my emails if Outlook closes without saving?

Emails that have already been sent or received are safely stored on your email server and will sync when you reopen Outlook. However, any offline drafts or unsaved local calendar entries you were working on right before the crash may be lost.

What exactly does Outlook Safe Mode do?

Safe Mode forces Outlook to launch without loading COM add-ins, custom toolbar settings, or the Reading Pane. It is a diagnostic mode designed strictly to help you bypass software conflicts that cause the app to crash or freeze.

How do I permanently remove an add-in instead of just disabling it?

To permanently remove an add-in, open Outlook normally, go to File > Options > Add-ins. Select 'COM Add-ins' next to Manage, click 'Go', select the problematic add-in from the list, and click the 'Remove' button.

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