License-checks are done each time the application is accessed by a user.
Having an invalid license stops the whole product from working.
An invalid license will never have any impact on Dynamics 365, it only limits the addon itself.
Reasons for an invalid license :
Licensetype normal license (aka perSite license)
Requires a license for each active Dynamics 365 user, no matter if he uses the product or not. If new Dynamics 365 users are added, the license needs to be extended with more users as well.
Disabled, ReadOnly users and Administrative users do not require a license.
Users without any security role can be exempted. Find more information about how to count only users with security roles for licensing here.
Service app security roles are excludet.
Licensetype perUser license
Requires only as many licenses as you actually want to have, but starts at a minimum of 10 licenses and is double the price of a site license.
The license is a named user license and the license is activated via a checkbox on the Systemuser entity for a specific user.
You may activate as many users for the access as you have licenses.
Exceeding the granted license count stops the product for all users.
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