Is it possible to join my active directory domain joined devices to azure AD For activation of windows 10 licenses.

In my environment I'm running windows server 2016 Active directory. All of my users are using laptops running windows 10 and are joined to active directory domain.
I recently bought windows 10 licenses through office 365.
Have already set up azure ad connect and synced user objects to azure AD then assigned them windows 10 licenses from the portal.
I need to activate windows 10 licenses for them,
my question is will i need to join the devices to azure AD by asking the users to add their accounts then sign in to the device using their cloud credentials here
Go to Settings > Accounts > Access work or school, .
If so what will be the impact? , will i still be able to manage the devices using on-premises active directory.