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olk.exe - Entry Point Not Found

Super Group 0 Reputation points
2026-04-21T11:47:45.4566667+00:00

Dear Team,

I am getting the olk.exe - Entry Point Not Found error on my Microsoft 365 Outlook.

Please help me with this.

Thanks and Regards,

Ginish Kochappu

Outlook | Windows | New Outlook for Windows | For home
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  1. Sumit D - IA 169.2K Reputation points Independent Advisor
    2026-04-21T12:25:21.92+00:00

    Hi Ginish,

    It is a known issue with the new updates.

    [https://learn.microsoft.com/en-au/answers/questions/5861910/olk-exe-entry-point-not-found-(trycreatepackagedep](https://learn.microsoft.com/en-au/answers/questions/5861910/olk-exe-entry-point-not-found-(trycreatepackagedep)

    Please try this, and let me know if it works, my community colleague suggested that in a Reddit thread and it worked.

    Try this, please.

    Press Windows + R, type %localappdata%\Microsoft, and press Enter.

    Delete the Olk and OneAuth folders.

    Restart Outlook.

    This only removes temporary Outlook data that will be recreated automatically. Please try reconfiguring the account and let me know.

    I hope this information helps. If you have any more questions, don't hesitate to reach out.

    Otherwise, please take a moment to rate the answer. Wishing you good luck!

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  2. AI answer

    2026-04-21T11:47:55.3633333+00:00

    The error “olk.exe – Entry Point Not Found” indicates Outlook is failing when calling a function in a DLL. For New Outlook on Windows, this is typically caused by a corrupted local Outlook profile/cache or related authentication components.

    Use these steps to fix it:

    1. Close Outlook and all Microsoft apps (Teams, Word, etc.).
    2. Clear New Outlook’s local state:
      • Press Windows + R.
      • Type (including quotes if needed): olk.exe --clearLocalState
      • Press Enter.
      • After the command completes, start New Outlook again.
      • Sign in when prompted and let Outlook resync the mailbox.
    3. If the problem persists, delete New Outlook’s local data and auth cache so they can be rebuilt:
      • Ensure Outlook and all Microsoft apps are closed.
      • Press Windows + R, type appdata, and press Enter.
      • Go to Local > Microsoft.
      • Delete the folders:
        • Olk
        • OneAuth
      • Restart the computer.
      • Open New Outlook and sign in again.
    4. If Outlook still fails, perform a full Office repair/reinstall:
      • Uninstall Microsoft 365/Office from Apps & Features.
      • Restart the PC.
      • Reinstall Microsoft 365 from the subscription portal.
      • Open Outlook and sign in.

    If none of these steps resolve the error, raise a support request via the Microsoft 365 support channel so engineering can review logs for the device and account.

    References:

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

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