Since SharePoint 2013 the sign in as a different user option is not available, but still we have an option to show the sign in as a different user option in SP sites

Follow the below listed steps to show the sign in as a different user option,

Step 1

Go to the SharePoint server, where the SP site is hosted

Step 2

Then open the below windows explorer path in SP server

C:\Program Files\Common Files\microsoft shared\Web Server Extensions\16\TEMPLATE\CONTROLTEMPLATES

Step 3

On the control templates open the welcome.ascx page as shown in below,

Step 4

Add the below code in Welcome.ascx page,

  1. <SharePoint:MenuItemTemplate runat="server" ID="ID_LoginAsDifferentUser" Text="<%$Resources:wss,personalactions_loginasdifferentuser%>" Description="<%$Resources:wss,personalactions_loginasdifferentuserdescription%>" MenuGroupId="100" Sequence="100" UseShortId="true" />

Save the file, finally you will get sign in as a different user option in SharePoint Site,

Summary

In this blog we have explored how to add sign in as a different user option in SharePoint 2016