Opened emails not reopening when Outlook crashes

Rotert, Kenneth 0 Reputation points
2026-09-08T21:17:06.9866667+00:00

Despite my settings being set to open emails from last session sometimes this does not happen. I see this is a common problem and Microsoft's response is that it's not possible. Given how often this happens Microsoft needs to make it possible.

Outlook | Windows | Classic Outlook for Windows | For business
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  1. AI answer

    2026-09-08T21:17:20.82+00:00

    This behavior is a known issue in classic Outlook on some Office perpetual retail SKUs starting with Version 2306 (Build 16529.20154). Outlook can prompt to reopen items from the last session inconsistently, and in many cases the Outlook Options UI does not show the setting even though the feature exists.

    What is supported:

    1. Check whether the setting is available in Outlook:
      • File > Options
      • General tab
      • Under Start up options, look for Ask me if I want to restore previous items
    2. Update Office if possible:
      • This issue is fixed in Version 2309 Build 16827.20130.
      • In Outlook, go to File > Office Account > Update Options > Update Now.
    3. If the option does not appear and the goal is to stop Outlook from reopening previous items, a registry workaround is documented.
      • Warning: editing the registry can cause system or application problems if done incorrectly.
      • Registry path: HKEY_CURRENT_USER\Software\Microsoft\Office\16.0\Outlook\Preferences
      • DWORD: ReopenWindowsOption
      • Values:
        • 1 = Never reopen previous items
        • 0 = Ask me if I want to reopen items
        • 2 = Always reopen previous items

    Important limitation: the documented workaround is only for disabling or changing the reopen behavior, and Microsoft notes that because the feature recurrently appears and disappears, the workaround might not stop all occurrences. The available documentation does not provide a supported method to force Outlook to reliably reopen all previously opened emails after a crash in every case.

    AI-generated content may be incorrect. Read our transparency notes for more information.

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  2. Lin v 1,110 Reputation points Independent Advisor
    2026-09-08T22:19:03.7266667+00:00

    Hi Kenneth,

    Thanks for sharing your experience.

    I tested this on my side by opening multiple email windows and then force-closing Classic Outlook. After reopening Outlook, the previously opened email windows were not restored.

    Since Outlook includes an option to reopen items from the previous session, it is certainly reasonable to expect previously opened email windows to be restored when Outlook is reopened.

    However, this is a user-to-user community forum, and no one here has the ability to influence product decisions or changes in Outlook's behavior directly. For that reason, I would suggest submitting feedback through the Feedback Portal, where the Outlook product team can review customer feedback and assess potential improvements.

    I also found an existing feedback item that appears to describe the same issue: When Outlook crashing, previous session emails do not re open. You may wish to vote for that feedback item and add a comment with details of your experience. Additional votes and comments can help give the product team better visibility into the impact of the issue.

    Hopefully this helps point you in the right direction. If you decide to create a new feedback item instead, feel free to come back and share the link here. I'd be happy to upvote it as well to help increase its visibility.

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