Word Add-In Deployment

Hi there, 

I am trying to deploy an add-in for some users for MS Word (right now we're just testing so it is limited just to a few people in our IT Dept.).  We are trying to deploy the DocuSign add-in.  I have done this through the Integrated Apps section of the O365 Admin Centre and applied it to a Security Group in our Active Directory.  The issue we are facing is, when deploying the add-in it does not seem to want to automatically install on most of our users' MS Word applications (we did have 2 test users who said it was automatically installed).  What we've had to do for the other test users is go to the "Get Add-ins" section of MS Word and click on "Admin Managed", then click on DocuSign to add it to the ribbon.  Is there some setting somewhere that would have it automatically installed on our users' systems as opposed to having them add it manually?

Thanks!