title: How to authenticate in Excel Office Add-In from Microsoft Azure AD
body: <p>I have created an app (Excel Add-In) and deployed on Azure.<br>
  Now I want to <strong>enable the Authentication</strong>. In <strong>Excel Office Add-In</strong> it should ask for <strong>Azure user name and password</strong>. After enabling the AD authentication on Azure, it is asking in browser but I need this in Excel.<br>
  Please help me to achieve this.<br>
  Thanks</p>