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just bought 365 premium. installed desktop apps but they won't activate. error code 0x0.

Randy Daughters 0 Reputation points
2026-02-10T02:08:45.0133333+00:00

just bought 365 premium. installed desktop apps but they won't activate. Desktop app opens but gives error code 0x0. Using MacOS

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

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  1. Gunasekar N 60,630 Reputation points Independent Advisor
    2026-02-10T02:46:59.0233333+00:00

    Hello, thank you for reaching out to Microsoft Q&A.

    Please use the Office License Removal tool to remove all the previous traces of the license on your MAC and then reactivate it using your Microsoft account. You can download and run the tool from the Official Microsoft website here:

    How to remove Office license files on a Mac

    This tool should help you to remove and reactivate the Office license on your device.

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  2. kagiyama yutaka 1,165 Reputation points
    2026-02-10T02:45:59.69+00:00

    i might be wrong here, but that 0x0 on mac usually means the lic token never actually bound into the keychain… it kinda just falls thru. signing out of all ms apps and forcing a clean login from the acct portal is the only thing that’s ever re‑anchored it for me.

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