Error code 29 when starting O365

Anonymous
2023-12-05T02:59:44+00:00

I get this message every time I start Word or Excel and enter my valid email account name:

Apps show correct account when I acknowledge and enter program.

Microsoft 365 and Office | Subscription, account, billing | For home | Windows

Locked Question. This question was migrated from the Microsoft Support Community. You can vote on whether it's helpful, but you can't add comments or replies or follow the question.

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  1. Anonymous
    2024-08-21T13:25:56+00:00

    Out of nowhere, I encountered error 29. My 365 subscription was paid in full and had previously worked flawlessly.

    After several hours of frustration trying to fix the issue myself, I called Microsoft support, who had me delete these two directories:

    %localdata%\Microsoft\IdentityCache

    %localdata%\Microsoft\OneAuth

    After that, I was able to login into 365 apps without any license issues. Error 29 was gone. FYI, the two directories I deleted where re-generated after successfully logging into Word or Excel.

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  2. Anonymous
    2024-07-07T14:53:55+00:00

    I struggled as well with this issue, but I got it resolved now.

    I think what eventually made it work again was running the scripts under "Method: Use scripts to automate the cleanup process": https://learn.microsoft.com/en-us/office/troubleshoot/activation/reset-office-365-proplus-activation-state#method2

    Running the Microsoft Support and Recovery Assistant did not work.

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  3. Anonymous
    2024-02-13T13:48:36+00:00

    I have not opted into CoPilot and have been getting this error for at least 5 - 6 months.

    Don't think it is related to CoPilot.

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  4. Anonymous
    2024-02-13T11:29:48+00:00

    Same problem here... I activated Copilot Pro subcription and then I tried to make it available on O365 apps... However when I try to update the license.. I got the error 29. I've reinstalled, etc... without luck... thinking to remove copilot license because it is so clear that the product is still a beta...

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  5. Anonymous
    2024-02-12T12:38:29+00:00

    Hi Elmar08,

    Thank you for your response! I will continue to follow up on this issue here.

    Best regards

    wanzhiyu

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