- Add the STS URL to the intranet zone in Internet Explorer.
- Make sure that the default Advanced security settings for Internet Explorer are configured to have the Enable Integrated Windows Authentication check box selected under Security.
- Make sure that the User Authentication Logon setting in the intranet zone is configured to have the Automatic logon only in the Intranet Zone option selected.
Note When users are authenticating externally, Integrated Windows Authentication is not used because this process works only when the computer is connected to the internal corporate domain. In this situation, users would typically see a Skype for Business authentication prompt.
Article ID: 3151226 - Last Review: Apr 1, 2016 - Revision: 1