How am I synchronised with Boost My Mail? (Add-in vs Windows application)

There are two channels for distributing signatures in Outlook:

• The Boost My Mail Add-in, which is an add-in (or plug-in) that allows the most appropriate email signature to be added and/or selected when the user is composing and sending an email. Once deployed via Office 365, it is directly available in Outlook when the user creates a new email:
  
  In the old version of Outlook, the Boost My Mail add-in is displayed in the ribbon, but you can also find it via the Apps add-in.

In the new version of Outlook, you can find it in the ribbon when you create a new email by going to the Apps add-in.

In the Outlook Web App (OWA) version, you can also find it in the Apps add-in.

• The Boost My Mail Windows application allows the most appropriate email signature to be added and/or selected when the user is composing and sending an email. It must be installed on users’ computers. It is then available in the Windows system tray.