Outlook Login Problems

Fix Outlook Password Works on Mobile But Fails on Windows 11

Maira Mehtab Sep 27, 2026 869 views

Question details

The user is unable to log into Outlook or Microsoft 365 on a Windows 11 computer after an Office reinstallation, even though the same password works flawlessly on mobile devices.

Product: Microsoft Outlook
Device & OS: Windows 11, iOS
Scenario: Logging into Microsoft Outlook or Microsoft 365 on a Windows 11 desktop computer after reinstalling the software.
Observed behavior: The password is repeatedly rejected on the Windows 11 computer, despite successfully authenticating on an iPhone or iPad.

Before you start

Verify that your Windows 11 system and Microsoft Office suite are updated to the latest versions, and take note of the exact error message before modifying system credentials.

Solution 1Recommended

Clear Outdated Windows Credentials

Removing old or corrupted saved passwords from the Windows Credential Manager can resolve authentication conflicts preventing Outlook from logging in.

Windows stores login tokens in the Credential Manager. If these tokens become corrupted or outdated after reinstalling Office, they can automatically reject your login attempts without pinging the live server.

Open Credential Manager

Click the Start button, type 'Credential Manager' in the Windows search bar, and press Enter.

Locate Windows Credentials

Select the 'Windows Credentials' tab to view your saved system and application passwords.

Remove Office Credentials

Scroll down to 'Generic Credentials', locate any entries starting with 'MicrosoftOffice', expand them, and click 'Remove'. Restart your computer and try logging into Outlook again.

Solution 2

Test with a New Local Administrator Profile

Creating a new user profile helps determine if the login issue is caused by deep corruption within your current Windows user profile.

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Frequently Asked Questions

Why does my Outlook password work on my phone but not my PC?

Mobile devices and PCs use different authentication tokens and credential managers. On a Windows PC, an outdated or corrupted token cached in the Windows Credential Manager can cause your valid password to be automatically rejected by the system.

Do I need to reinstall Microsoft Office if my password isn't working?

Not necessarily. Password rejection is typically tied to saved credentials or Windows profile issues rather than the application itself. Reinstalling Office often doesn't clear the stored Windows credentials, which is why the issue persists.

Will creating a new Windows profile delete my existing files?

No. Creating a new local administrator profile simply provides a fresh user environment to test the Outlook login. All your personal files, documents, and settings remain safe and untouched in your original user profile.

Outlook & Email Problems