How to Create and Use an App Password for Outlook

An App Password is a special password generated from your Microsoft account for applications that don’t support modern security methods such as two-step verification.

If you’re wondering how to generate an app password for Outlook, think of it as a dedicated password used specifically for Outlook or similar applications when normal sign-in is blocked by older authentication methods.

Why It’s Important

Creating an Outlook app password may help if:

• Outlook repeatedly asks you to sign in.
• Microsoft Office 365 is not working correctly in an older app.
• The application does not support two-factor authentication.
• You are experiencing Microsoft 365 sign-in problems.
• You recently enabled two-step verification and Outlook no longer accepts your normal password.

This method can be especially useful when setting up an older version of Outlook on a new device or when using a third-party mail client that does not support Modern Authentication.

Use an app password if:

• Two-step verification is enabled.
• You're using an older version of Outlook.
• Outlook does not support Modern Authentication.

You probably don't need one if:

• You're using Outlook on the web.
• Modern Authentication is already working.
• Your administrator has disabled app passwords.

You may not need an Outlook app password if:

• You're using the latest version of Microsoft Outlook with Modern Authentication.
• Two-step verification is not enabled on your account.
• Your organization has disabled app passwords.
• You're signing in through Outlook on the web.
• Your Microsoft 365 administrator recommends another authentication method.

Here’s how to create an app password for Office 365 and use it with Outlook.

Many Outlook sign-in problems happen because of small setup mistakes.

• Using your normal Microsoft password instead of the app password.
• Copying extra spaces before or after the app password.
• Disabling two-step verification after creating the app password.
• Outlook is saving an old cached password.
• Using an outdated Outlook version.

If Outlook still won't sign in, the problem may not be the app password itself.

You may see messages such as:

• Outlook keeps asking for your password.
• Authentication failed.
• Cannot connect to the server.
• Your credentials need attention.
• Outlook cannot authenticate.
• Something went wrong.
• Password incorrect.

Different error messages can point to different causes, so noting the exact message can make troubleshooting much easier.

Many users search for solutions when Outlook keeps asking for a password even after entering the correct credentials. This issue is often caused by outdated cached credentials, profile corruption, authentication conflicts, or Microsoft 365 synchronization problems.

Try these fixes:

• Remove saved credentials from Windows Credential Manager.
• Update Outlook to the latest supported version.
• Repair your Outlook profile.
• Remove and re-add your Microsoft 365 account.
• Verify that multi-factor authentication settings are configured correctly.

If Outlook keeps asking for a password repeatedly, creating a new Outlook profile may resolve the issue.

If your Outlook app password is not working, don't automatically assume that the password itself is incorrect.

Common causes include:

• Two-step verification was disabled after creating the app password.
• The app password was revoked.
• Outlook is using an old cached password.
• Microsoft account security settings changed recently.

To fix Outlook app password issues:

1. Delete or revoke the existing app password.
2. Generate a new app password from your Microsoft account.
3. Remove saved Outlook credentials.
4. Restart Outlook and enter the new app password.

If Outlook still won't authenticate after creating a new app password, the issue may involve your Outlook profile, Microsoft 365 configuration, or email account settings. Learn more about our Email Troubleshooting Services and how we diagnose Outlook and Microsoft 365 issues remotely.

Another common Microsoft 365 issue occurs when Outlook cannot connect to the server.

Possible causes include:

• Internet connectivity problems.
• Microsoft 365 service outages.
• Incorrect account configuration.
• Firewall or antivirus interference.
• Corrupted Outlook data files.

Before contacting support:

• Verify your internet connection.
• Check Microsoft 365 service status.
• Restart Outlook and your computer.
• Disable VPN software temporarily if appropriate.
• Confirm that your account password is correct.

If Outlook cannot connect to the server after these steps, the issue may involve your Outlook profile, Microsoft 365 account, authentication settings, or mail server configuration. Our Professional Email Troubleshooting and Repair Service can diagnose these issues remotely.

If you are also experiencing Microsoft 365 sign-in issues , Outlook profile errors, or account authentication problems, our Office 365 troubleshooting team can help diagnose and resolve the issue remotely.

If you’ve followed the app password steps but Microsoft Office 365 is still not working, the issue may not be related to the password.

Some other common problems include:

• A corrupted Outlook profile.
• Add-in conflicts.
• Outdated versions of Outlook or Windows.
• Background synchronization issues.

In these situations, professional troubleshooting may be needed to identify the actual cause.

ASP stands for Application-Specific Password and is another term often used for an app password.

So, if you're wondering how to generate an ASP in Outlook email, the process is essentially the same as creating an app password for an application that cannot use your Microsoft account's normal authentication method.

Tips to Keep Your Outlook Account Secure

• Always use a supported and updated version of Outlook.
• Use trusted security software and firewall protection.
• Keep your Microsoft account recovery information updated.
• Avoid signing into important accounts on untrusted networks.
• Regularly review your account sign-in activity.

At MicroSec®, we go beyond explaining how Outlook authentication works. We help customers troubleshoot Microsoft 365 and email issues with practical remote support.

Here’s what makes us different:

• Fast, human support for real-world problems.
• Microsoft Office 365 troubleshooting expertise.
• Personalized help when your Outlook application password will not work.
• Practical guidance for secure Outlook and Microsoft account configuration.

Not every Outlook sign-in problem requires an app password. The table below shows when an app password is likely to help and when another solution may be needed.