I can't login to my subscription to Microsoft 365 on my Mac.

Anna Bromeland 0 Reputation points
2026-11-11T21:08:08.8766667+00:00

My Mac is up to date. I've closed any Microsoft apps. I've tried deleting keychains. Then restarting computer. I know my Microsoft Login Works because I can access it on the internet and I can see my Microsoft 365 subscription is active.

But I can't log into Microsoft in the Apps on my Mac. HELP!!

Microsoft 365 and Office | Install, redeem, activate | For home | MacOS
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  1. Norah-L 13,605 Reputation points Microsoft External Staff Moderator
    2026-11-12T01:38:37.2566667+00:00

    Hello Anna Bromeland,

    Since the same account works in your browser and the subscription is active, the problem may be limited to your current Mac profile or network.

    Try connecting through another network, such as your phone’s hotspot. Temporarily disable any VPN or third-party antivirus/web-filtering feature before testing, as these can sometimes block the Office sign-in window.

    Another useful test is to create a temporary Mac user from System Settings > Users & Groups, sign into that profile, and open Word. Some users with the same symptoms were able to sign in normally from a new profile. If that works, it confirms that the Office installation and subscription are fine, and the issue is within the original Mac profile.

    Could you also share the exact error message, or describe whether the sign-in window is blank, spinning, or closing? This will help identify the appropriate next step.

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  2. AI answer

    2026-11-11T21:13:10.5333333+00:00

    Run Microsoft’s Office License Removal Tool rather than deleting more Keychain entries; it removes all local Microsoft 365 for Mac license files so the apps can create a clean activation state.

    Reset the Office license

    You have already updated macOS, closed the apps, cleared Keychain entries, restarted, and verified the subscription online, so do not repeat those steps manually.

    1. Make sure you know the email address and password attached to the active subscription. The removal process deletes licenses from this Mac, but it does not cancel or alter the subscription.
    2. Download Microsoft’s license removal tool.
    3. Open the downloaded .pkg file.
      • If macOS reports an unidentified developer, Control-click the file and select Open.
    4. Select Continue, follow the prompts, and then select Install. Enter the Mac administrator password if requested.
    5. When the tool reports that the licenses were removed, select Close.
    6. Open Word first and select Sign in or Sign in with another account.
    7. Enter the email address associated with the Microsoft 365 subscription.
      • If offered a choice between a one-time Office license and Microsoft 365, select Microsoft 365.
    8. After activation succeeds, restart the Mac.
    9. Remove the downloaded removal tool by dragging Microsoft_Office_License_Removal from Finder → Downloads to Trash.

    These are Microsoft’s documented removal and reactivation steps.^1^

    If “Something went wrong” remains

    The wording alone does not identify a specific activation error. Check the pop-up carefully for an error code, particularly one beginning with 0x or a bracketed number.

    • No code appears: Reinstall Office, but only after completing the license removal above. Microsoft documents reinstalling as the next conditional step when activation remains unsuccessful after license removal.^1^
    • Code 0xD000000C appears: If the macOS login is a network account, sign out of macOS and activate Office from a local macOS user account. This code can occur when Office cannot write credentials to a read-only network-account Keychain.^2^
    • Another code appears: Use the code-specific branch in Microsoft’s Office for Mac activation guide rather than repeating credential cleanup.^3^

    If a clean license reset and reinstall both fail, contact Microsoft Support and provide:

    • The exact error code or a screenshot of the complete message
    • macOS version
    • Office version from Word → About Microsoft Word
    • Whether the Mac account is local, network-based, or workplace-managed
    • Confirmation that browser sign-in works and the subscription is listed as active

    References

    1. How to remove Office license files on a Mac | Microsoft Support
    2. Error 0xD000000C when activating Office for Mac | Microsoft Support
    3. [Activation](https://support.microsoft.com/microsoft-365-activation-licensing/what-to-try-if-you-can-t-install-or-activate-office-for-mac)
    AI-generated content may be incorrect. Read our transparency notes for more information.

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