Classic Outlook Reverts To New Outlook After Closing It Down And Reopening

LGLDSR73-6492 1,480 Reputation points
2025-12-11T23:23:44.6533333+00:00

I have MS 365 Personal and I was using the New Outlook. I switched to the Classic version. Every time I close out of a session and relaunch Outlook it restarts in the New Outlook.

Any idea why this is happening?

Thank you,

LGLDSR73

Outlook | Windows | Classic Outlook for Windows | For home
0 comments
Answer accepted by question author
Jeronimo Fuerte 45,845 Reputation points Independent Advisor
2025-12-12T00:04:10.3066667+00:00

Sorry to hear that you’re having trouble with this. If this happens when you click the pinned Outlook icon in your taskbar, try pinning the one for the classic Outlook instead.

Unpin the current Outlook icon, then in the search bar look for Outlook (classic), right-click it, and select Pin to taskbar.

Was this answer helpful?

1 person found this answer helpful.

1 additional answer

Sort by: Most helpful
Most helpful Newest Oldest

  1. AI answer

    2025-12-11T23:23:53.9133333+00:00

    The issue you're experiencing, where Outlook reverts to the New Outlook after closing and reopening, may be related to how the toggle between Classic Outlook and New Outlook operates. When you switch to the Classic Outlook using the toggle, it should remain in that mode until you manually switch back to New Outlook. However, if the toggle setting is not being retained, it could be due to several factors:

    1. Registry Key Settings: The toggle's behavior can be influenced by registry settings. If the registry key controlling the toggle is not set correctly, it may not retain your preference.
    2. User Profile Issues: Sometimes, issues with the Outlook user profile can cause settings not to be saved properly. You might want to check if creating a new Outlook profile resolves the issue.
    3. Installation Issues: There may be installation-related issues affecting the functionality of the toggle. If security settings or other installation problems are present, they could cause the toggle to reset.
    4. Group Policies: If your organization has implemented group policies, they may override user settings, causing the application to revert to New Outlook.

    To troubleshoot this, you can try the following steps:

    • Ensure that your Outlook is updated to the latest version.
    • Check the registry settings related to the toggle.
    • Consider creating a new Outlook profile to see if that resolves the issue.
    • If applicable, consult with your IT administrator regarding any group policies that might be affecting your Outlook settings.

    If the problem persists, reaching out to Microsoft Support with detailed information about your issue may help resolve it.

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

    Was this answer helpful?

Your answer

Answers can be marked as 'Accepted' by the question author and 'Recommended' by moderators, which helps users know the answer solved the author's problem.