Is Office Blocking Your Sign-In? Here Is the Fix

If your workflow is blocked, confirm the account and app context, then follow the ordered fixes below.

Problem Description: Unable Login Admin Center

I am unable to login to Admin center using text verification. Unfortunetly I have lost access to my Autenticator as my phone was stolen and the backup did not restore. I am getting Sorry, we're having trouble verifying your account. Please try again. Error Code: 399287 Request Id: **[Moderator note: personal info removed]** Correlation Id: **[Moderator note: personal info removed]** --- *Moved from: Microsoft Security | Microsoft Authenticator*

Quick Answer for Office Setup on New Device

The error code 399287 indicates your phone number for SMS-based 2FA may be flagged with poor reputation, often after multiple failed login attempts.

Likely Causes Behind MFA Root Factors

• The Microsoft account or license context may not match the purchase or device.

• Cached credentials, outdated builds, or damaged local components can trigger mfa & verification issues.

• A file-specific corruption or add-in conflict can mimic a broader application failure.

Recommended Solution: Fixing MFA Step by Step

When to use this: Apply these steps when the symptoms match and you can access the relevant Microsoft account or administrator.

1. If you are not the only admin, ask another admin to reset your authentication methods or temporarily disable MFA for your account.

2. If you are the only admin, contact Microsoft support with your tenant ID and error details for assistance in regaining access.

Alternative Solutions for Secondary Login Fixes

1. Retry the Microsoft-side steps after restarting the app and device.

2. Test the same action in a private browser session or a new blank file to isolate account vs file issues.

3. Capture exact error text and screenshots before contacting Microsoft Support or your administrator.

Working with WPS Office: WPS as a Local Alternative

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.

1. Download and install WPS Office from the official website.

2. Open local Word, Excel, PowerPoint, or PDF files in the matching WPS app.

3. Save a working copy locally while Microsoft-side issues are resolved.

4. 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 Keeping Office Stable Long Term

• 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.

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FAQs About Office Support Questions

Can WPS Office fix this mfa & verification issues 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 Office 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.