When Word stops working as expected, start with the shortest official checks before you reinstall anything.
Problem Description: Lost Access Admin Centre
Since yesterday I can no longer log into my 365 business account. The account is no longer reflected in the MFA app and alternative SMS verification does not work either. I get the notification account cannot be verified or account does not exist with the error code 399287. I have no clue what is going on and it worries and frustrates me. Cannot raise a ticket because for that you need to be logged in.... No one picks up the phone on the support line, even after hours and hours of waiting/holding the line. I need to speak to a human Please help!!! I need this account for my work. I have all the related/recover email addresses, phone number etc.
Quick Answer for Word Won't Complete Task
If you are locked out of the Microsoft 365 Admin Center and SMS verification fails with error 399287, the issue is likely related to Microsoft's PhoneReputation service, which blocks verification for flagged phone numbers.
Likely Causes Behind Common Account Locked Triggers
The Microsoft account or license context may not match the purchase or device.
Cached credentials, outdated builds, or damaged local components can trigger account locked & blocked.
A file-specific corruption or add-in conflict can mimic a broader application failure.
Recommended Solution: Fixing Account Locked Step by Step
When to use this: Apply these steps when the symptoms match and you can access the relevant Microsoft account or administrator.
If you are the only global administrator and cannot access the admin center, contact Microsoft's Data Protection Team for identity verification and MFA reset assistance.
Alternative Solutions for Broader Account Locked Workarounds
Test the same action in a private browser session or a new blank file to isolate account vs file issues.
Capture exact error text and screenshots before contacting Microsoft Support or your administrator.
Working with WPS Office: Using WPS While Word Is Unavailable

WPS Office cannot replace Microsoft account, activation, or cloud fixes for this scenario. It remains one of the best free Microsoft Office-compatible alternatives for opening and editing local files.
Download and install WPS Office from the official website.
Open local Word, Excel, PowerPoint, or PDF files in the matching WPS app.
Save a working copy locally while Microsoft-side issues are resolved.
Return to Microsoft Office after the primary fix succeeds.
If you need a practical local workspace in the meantime, try WPS Office.
Prevention Tips for Avoiding Repeat Account Locked
Keep one primary Microsoft account for subscriptions and Office sign-in.
Install updates for Office and Windows before retrying failed workflows.
Back up important files before repair, reset, or reinstall actions.
Register more than one MFA method and keep recovery contacts current.
FAQs About Lost Troubleshooting FAQ
Can WPS Office fix this account locked & blocked issue directly? Only when the WPS steps match the formatting or file task. Account, activation, and cloud issues stay on the Microsoft side.
Should I reinstall Word before trying these steps? Not first. Confirm account, license, and the exact error before reinstalling.
What should I send to Microsoft Support? The affected account email, device type, Office version, exact error text, and screenshots with personal data hidden.




