SharePoint 2013 adds many new features, including improvements to Lists, Sites, and Pages, as well as a variety of changes pertaining to user interface and locations. In some cases, these changes can cause difficulties in using your sites.  In this article, we will take a look at how to show Windows Security to log on to a site in SharePoint 2013. As you know, Windows Security is used for entering a user name and password to log on to a site. So, if it is not shown, you cannot go to the site. This walkthrough shows you how to show Windows Security to log on to a site in SharePoint 2013.

First let’s talk about the user interface involved in the process.  In SharePoint 2010, Windows Security was the default way for users to log on to a site:

In SharePoint 2013, however, you will see the message, ‘Sorry, this site hasn’t been shared with
you’:

In SharePoint 2013, the IE browser always uses the ‘Automatic logon only in Intranet zone’ option:

There are two ways to resolve this problem:

Your first option is to add ‘loginasanotheruser=true’ to the link in the following structure:

http://servername/_layouts/closeConnection.aspx?loginasanotheruser=true.

After hitting Enter, Windows Security will be shown:

To utilize the second option, in the Menu bar, select Tools then Internet options:

Select the Security tab, and then the Custom level button:

Under the User Authentication section, select the ‘Prompt for user name and password’  option, and then click OK:

Refresh the page, and you will be prompted Windows Security:

Good Luck!