This application requires an active Constant Contact account.
As you view your messages in Outlook Web App (OWA) or Outlook for Microsoft Office 365, the Constant Contact App automatically checks to see if the sender’s email address exists in one of your Constant Contact lists.
If the sender has been previously added, their most recent Constant Contact activity is displayed. If the sender is not yet on one of your Constant Contact lists, you can seamlessly add them to the list(s) of your choice.
The Constant Contact App for Outlook works with Outlook for Office 365 or OWA 2013 Technical Preview and later. The app does not support desktop versions of Outlook.