Easily Resolve Problem Confirm Identity Telephon in Microsoft 365

This guide walks you through mfa & verification issues using Microsoft-supported steps first, with WPS only where it genuinely helps.

Problem Description: Problem Confirm Identity Telephon

I would like to change my laptop. I try to connect to my Microsoft account (to tranfert all data one OneDrive to the new laptop). However, I meet a problem with the authentification by SMS. - **Code d'erreur :** 399287 - **Request Id :** [Moderator note: personal info removed] - **Correlation Id :** [Moderator note: personal info removed] - **Timestamp :** [Moderator note: personal info removed]  How can i solve this problem? --- Moderator: Moved from `Microsoft 365 and Office | Access | For business | Windows`

Quick Answer for Office Won't Complete Task

Error 399287 indicates that your phone number has been temporarily blocked by Microsoft’s PhoneReputation system due to repeated failed authentication attempts or suspicious activity.

Likely Causes Behind Common MFA Triggers

• 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• Cached credentials, outdated builds, or damaged local components can trigger mfa & verification issues.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: Restoring Office After Errors

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

1. When this restriction occurs, SMS and voice call multi-factor authentication methods are disabled for security purposes.

2. If you are the sole administrator and lack alternative verification methods, you cannot reset your security information independently.

3. Contact another IT administrator in your organization to perform a global MFA reset on your behalf through the Microsoft Entra admin center.

4. If no other administrators exist, you must submit a formal recovery request to Microsoft Support to verify your identity and restore account access.

Alternative Solutions for Broader MFA Workarounds

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: Using WPS While Office 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.

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 Avoiding Repeat MFA

• 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 Problem Troubleshooting FAQ

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.