How to fix "native_auth_error: See https://aka.ms/msal.js.errors#native_auth_error for details"

Question

I have added Claude for Outlook add in to my business account. When I am in Outlook and an email, I've tried opening Claude for Outlook and get this error: "native_auth_error: See https://aka.ms/msal.js.errors#native_auth_error for details". How do I resolve this?

Answer 1

Hi @Nicole Vorkapic

Good day, and I appreciate the clear explanation of your concern.  

Based on the issue you described, you can try the following troubleshooting steps:

1/ Test the add-in in Outlook on the web

The add-in is supported in Outlook on the web as well as the new Outlook for Windows. If it works correctly in Outlook on the web but not in the Windows app, this likely indicates a client-side issue rather than a problem with your account.

2/ Remove and re-add the add-in

As this is a beta add-in, refreshing its configuration may help:

• Remove the add-in from Outlook
• Reinstall it to clear any stale or corrupted local data

3/ Ensure WebView2 is installed and functioning properly

Office add-ins rely on Microsoft Edge WebView2 to run correctly. If the WebView2 runtime is missing or not functioning properly, Outlook add-ins may fail to load or operate as expected. In most cases, Microsoft 365 installs this component automatically on supported systems.

To verify its presence:

• Go to Control Panel > Programs > Programs and Features
• Look for Microsoft Edge WebView2 Runtime in the list.
• If you see Modify or Advanced options, use Repair if available.
• After repairing:
  • Restart Windows
  • Open Outlook
  • Test the Claude add-in again.

For reference: Microsoft Edge WebView2 and Microsoft 365 Apps

4/ Repair the Outlook app 

• Open Window Settings
• Go to Apps > Installed Apps
• Find Outlook, click the three dots, and then select Advanced options
• Click Repair and test the problem
• If the problem persists, go back to the same menu and click Reset.

5/ Contact your IT admin 

If the issue continues, please reach out to your IT administrator for further assistance. They can investigate further or submit a support request through the Microsoft 365 Admin Center by following the steps here: Get support - Microsoft 365 admin | Microsoft Learn . 

If you’re unsure who your IT admin is, you can find guidance here: How do I find my Microsoft 365 admin? - Microsoft Support. 

Note: We appreciate your understanding regarding the scope of support available through this forum. As moderators, our role is to provide general guidance and assist with common troubleshooting steps. While we do not have access to internal systems or administrative tools required to resolve account-specific or backend-related issues but we’ll continue doing our best to support you within the scope of our responsibilities. 

I hope this helps you move forward. If you have any questions or need further clarification, please feel free to reach out. I’ll be happy to assist further. 

Thank you for your patience and understanding, and I look forward to supporting you. 

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