- Open Central Administration
- Click on “Manage Web Applications”.
- Highlight the targeted web applications.
- Click on “Authentication Providers”.
- Click “Default” next to Windows.
- Scroll down and change IIS Authentication Settings from Negotiate (Kerberos) to NTLM.
- Click Save at the bottom of the window. *This will take a few seconds up to a minute.
- Close the Authentication Providers window.
- Repeat for any additional web applications.