Fix Outlook Keeps Asking for Password on Windows 10

If Outlook on Windows 10 keeps prompting for your password even after you enter it correctly, the fix usually involves clearing saved credentials, repairing the mail profile, or updating the authentication method to match your email provider’s requirements. Below are the proven steps to stop the loop, starting with the most common cause.

Why Outlook Keeps Asking for Password

Outlook stores your login credentials in Windows Credential Manager and uses them to connect to your mail server. When the server rejects those stored credentials, Outlook re-prompts you. Common triggers include:

• Your password changed recently, but the old one is still saved.
• Your email provider enabled two-factor authentication (2FA) or modern authentication (OAuth), and Outlook is still using basic authentication.
• Corrupted Outlook profile or cached credentials.
• Windows 10 updates that reset security settings.
• Company policy requiring frequent password changes.

Step 1: Clear Saved Credentials in Windows Credential Manager

The most frequent fix is removing the old password that Windows stored. Here’s how:

1. Close Outlook completely.
2. Press Windows Key + S, type Credential Manager, and open it.
3. Click Windows Credentials.
4. Look for entries starting with Outlook, MicrosoftOffice, or your email server name (e.g., smtp.gmail.com).
5. Click the arrow next to each entry and choose Remove.
6. Restart Outlook. It will ask for your password again – enter the current one and check Remember my credentials.

If you have multiple accounts, remove all related entries to avoid conflicts.

Step 2: Enable Modern Authentication (OAuth)

Many providers (Microsoft 365, Gmail, Yahoo) now require modern authentication instead of basic password auth. If your Outlook is set to basic auth, it will keep rejecting your password even if it’s correct. To enable OAuth for your account:

1. Open Outlook and go to File > Account Settings > Account Settings.
2. Select your email account and click Change.
3. Under Incoming mail server and Outgoing mail server, ensure the authentication method is set to OAuth2 or Microsoft 365 (the exact label varies).
4. Click Next, then Finish.

If the option is grayed out, you may need to update Outlook or edit the registry (for advanced users only) – but first try the next steps.

Step 3: Repair or Recreate Your Outlook Profile

A corrupted profile is another common culprit. Outlook’s built-in repair tool can fix it without losing your emails:

1. Close Outlook.
2. Open Control Panel > Mail (or search for Mail in Windows search).
3. Click Show Profiles.
4. Select your profile and click Properties > Email Accounts.
5. Select your account and click Repair. Follow the prompts.

If repair doesn’t help, create a new profile:

• In the same Mail window, click Add to create a new profile.
• Set it as the default by choosing Always use this profile and selecting the new one.
• Add your email account again. Your old emails will reappear after the initial sync.

Step 4: Check Your Password and Account Settings

Before diving deeper, verify the basics:

• Log into your email via web browser with the same password. If it fails, change it and update Outlook.
• If you use 2FA, generate an app password from your provider and use that in Outlook instead of your regular password.
• Ensure your incoming/outgoing server names and ports are correct. For example, Gmail uses imap.gmail.com (993) and smtp.gmail.com (587).
• Check if your provider requires SSL/TLS – usually enabled by default.

Step 5: Update Outlook and Windows

Outdated software can have authentication bugs that are already fixed. Run Windows Update and Office Update:

1. Windows: Settings > Update & Security > Windows Update > Check for updates.
2. Outlook: File > Office Account > Update Options > Update Now.

After updating, restart and test. Many users report that a single update resolves the loop.

Step 6: Advanced Fixes (Registry and Command Line)

If nothing else works, try these advanced methods (back up your registry first):

• Delete the Outlook profile registry key: Navigate to HKEY_CURRENT_USER\Software\Microsoft\Office\16.0\Outlook\Profiles and delete the problematic profile (this removes the profile, not your emails).
• Run Outlook in safe mode: Hold Ctrl while clicking the Outlook icon. If the prompt stops, a third-party add-in is causing it. Disable add-ins via File > Options > Add-ins.
• Use the SARA tool: Microsoft’s Support and Recovery Assistant can automatically diagnose and fix Outlook authentication issues. Download it from Microsoft’s official site.

Frequently Asked Questions

Why does Outlook ask for password every time I start it?

This usually means the saved credential is missing or invalid. Clearing Credential Manager entries (Step 1) and re-entering your password is the most direct fix. If it persists, your account may require OAuth or an app password.

Will I lose my emails if I delete my Outlook profile?

No. Your emails are stored on the mail server (for IMAP) or in a local PST file (for POP). Deleting the profile only removes the account configuration. When you re-add the account, emails will re-download or reconnect.

How do I create an app password for Gmail or Outlook.com?

For Gmail: enable 2-Step Verification, then go to Google Account > Security > App Passwords. For Outlook.com: enable two-factor authentication, then go to Security > App passwords. Use the generated 16-character password in Outlook.

What is the difference between IMAP and POP in Outlook?

IMAP syncs emails across devices and keeps a copy on the server. POP downloads emails to your computer and removes them from the server by default. If you use POP and change devices, you may lose access to old emails.

Can a third-party antivirus cause Outlook password prompts?

Yes, some security software can block Outlook’s connection or interfere with credential storage. Temporarily disable your antivirus (not firewall) to test. If the prompt stops, add Outlook to the antivirus’s exception list.

Why does Outlook keep asking for password after Windows 10 update?

Windows updates can reset security settings or change how credentials are stored. Reapplying the steps above, especially clearing Credential Manager and re-entering your password, usually resolves it after an update.

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