Trying to use 365

Tom Mahoney 0 Reputation points
2026-09-29T18:00:38.77+00:00

On sept 17 my license for 365 renewed and now it doesn't work. ******@outlook.com. When I open Excel and try to activate I get: An unknown error has occurred. The error code is: 0x0

Microsoft 365 and Office | Install, redeem, activate | For home | Other

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  1. AI answer

    2026-09-29T18:00:54.5533333+00:00

    For error 0x0 after a Microsoft 365 renewal on Mac, the supported fixes are:

    1. Make sure macOS is version 12 or later.
    2. Close all Office apps.
    3. Update Office fully:
      • Open Finder > Applications > Microsoft AutoUpdate.
      • Select Update All.
      • If Microsoft AutoUpdate is not visible, check /Library/Application Support/Microsoft/MAU2.0/.
    4. Open Excel again and test activation.
    5. Verify the subscription is active on the correct Microsoft account at https://account.microsoft.com/services.
      • The Microsoft 365 subscription should appear there.
      • If it does not, sign in with the account that was used to buy the subscription.
    6. Sign out and sign back in with the correct account in the Office app.
      • If needed, choose Sign in with another account.
    7. If a renewal completed but Office still shows unlicensed, close all Microsoft 365 apps, confirm the subscription status on the Services & subscriptions page, then restart the apps.

    If Office was installed from the App Store instead of microsoft.com, update it through the App Store > Updates instead of Microsoft AutoUpdate.

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

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