Enabling authentication types

Note: These settings are only applicable to SharePoint On-Premise servers.
  1. From the SharePoint server, launch the SharePoint Central Administration site, and then click Application Management > Manage web applications.

  2. Select the web application, and then click Authentication Providers > Default.

  3. From the Edit Authentication dialog box, select Integrated Windows authentication.

    Notes:

  4. Select NTLM or Negotiate (Kerberos).

    Note: If Negotiate (Kerberos) is selected and Kerberos is not configured, then NTLM is used.
  5. Click Save.