Sign in as Different User in SharePoint 2013

It’s been noted that the “Sign in as a Different User” menu command is missing in SharePoint 2013

You can add the menu item back in, but I would suggest only doing this on test or development SharePoint servers. To do this, repeat this edit on all servers in your SharePoint farm:

• Locate the file \15\TEMPLATE\CONTROLTEMPLATES\Welcome.ascx and open in a text editor.
• Add the following element before the existing element with the id of “ID_RequestAccess”:
  

  <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.

Now, the menu item shall be displayed:

If you have any questions you can reach out our SharePoint Consulting team here.