Fix Repeated Windows Security Credential Prompts in Microsoft 365
Question details
Users experience recurring Windows Security credential prompts in Microsoft 365 applications despite successful authentication.
- Product
- Microsoft 365
- Device & OS
- Windows
- Scenario
- Working in Microsoft 365 desktop apps like Outlook, Teams, and OneDrive while already signed in.
- Observed behavior
- A Windows Security popup repeatedly asks for credentials throughout the day, even though users are not locked out, can access web versions normally, and continue to work in the desktop apps.
Verify that you can successfully sign in to Outlook on the web to confirm your account is not locked out in Active Directory or AD FS.
Clear Stored Credentials in Windows Credential Manager
Removing outdated or corrupted cached passwords can often stop recurring Windows Security prompts.
Windows stores authentication tokens for Microsoft 365 apps locally. If these tokens become corrupted or out of sync with the server, Windows Security will repeatedly prompt for new credentials even if your current session is active.
Ensure that Outlook, Teams, OneDrive, and all other Office applications are completely closed before proceeding.
Click the Start menu, type 'Credential Manager' in the search bar, and press Enter.
Click on the 'Windows Credentials' tab to view your saved network and application passwords.
Look for entries starting with 'MicrosoftOffice16', 'OneDrive', or 'Teams'. Click the downward arrow next to each relevant entry and select 'Remove'.
Restart your computer, launch your Microsoft 365 applications, and enter your credentials when prompted to create a fresh authentication token.
Disconnect and Reconnect Work or School Account
Refreshing the device connection to Azure AD can resolve background authentication glitches.
Consult the Windows Security and Privacy Forum
If local troubleshooting fails, the issue may require advanced Windows-level investigation regarding AD FS or scheduled tasks.
Switch to WPS Office to Avoid Complex Authentication Issues
If recurring Windows Security credential prompts in Microsoft 365 are disrupting your productivity, consider trying WPS Office. It provides a lightweight, hassle-free environment to view, edit, and manage your documents without complex background sync interruptions.
- 1. Download the Installer: Visit the official WPS Office website and download the free installation package.
- 2. Install the Software: Run the setup file and follow the quick installation wizard.
- 3. Start Working Instantly: Open WPS Office and enjoy editing your documents without constant login interruptions.
Frequently Asked Questions
Why does Windows Security keep asking for my Outlook password when I am already signed in?
This usually happens due to corrupted cached credentials in the Windows Credential Manager, outdated Office tokens, or network interruptions that cause Windows to re-verify your identity in the background.
Does this repeated prompt mean my Microsoft 365 account is locked out?
Not necessarily. If you can still access Outlook on the web or work normally between prompts, your account is not locked out in Active Directory or AD FS. It is likely a local Windows authentication glitch.
Can Windows scheduled tasks cause repeated credential prompts?
Yes. Certain background scheduled tasks that interact with network resources or older authentication protocols can trigger Windows Security to ask for credentials multiple times a day.
