Sign as Different User in 2013
To add the option to sign in as a diff user in 2013 follow these steps:
Locate the file \15\TEMPLATE\CONTROLTEMPLATES\Welcome.ascx
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.
Do on each WFE. careful updating hive files. any updates will overwrite your changes…
enjoy!