Cannot authenticate in Microsoft Edge

There is a known issue with Microsoft Edge not falling back to NTLM properly if Kerberos fails. If you experience issues with authenticating in Microsoft Edge, change the order of Windows Authentication Providers may solve the issue by following these steps.

1. You should always clear your cache and history before trying these solutions.

   1. Open Microsoft Edge.

   2. Click Menu in the top-right corner and then Settings. from the menu.

   3. Scroll down to Clear browsing data.

   4. Click Choose what to clear.

   5. Check the following options:

   • Cookies and save website data

   • Cached data and files

2. Open IIS Manager.

3. Select the website.

4. Double-click the Authentication icon in the IIS section.

5. Right-click Windows Authentication and select Providers.

6. Select tags for NTLM and click Move Up, so that it is first in the list after Negotiate.

   You may need to restart the website or restart the Application Pool.