Classic Outlook won't open

Walter Landis 0 Reputation points
2026-09-17T15:25:59.6266667+00:00

I use Classic Outlook. Used it yesterday. Can't open it today. Microsoft 365 subscription is up to date.

Outlook | Windows | Classic Outlook for Windows | For home
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  1. SD - IA 179.6K Reputation points Independent Advisor
    2026-09-17T16:07:31.6166667+00:00

    Hi,

    I will walk through a few steps with you. Some of these are just to help figure out what is wrong, not to fix it right away. So if nothing changes after a step, that is normal. I will keep going until we solve it.

    Press Windows+R keys on the keyboard, or Right-click Start on the Taskbar and choose Run.

    Type "Outlook.exe /safe"

    Press Enter.

    Does it open correctly?

    I will move forward based on these results.

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