There are two user classifications in Dynamics 365:
You can access different devices with the same subscription. This means that each user is required to have a named subscription and cannot be shared between multiple users even though they are not signed at the same time. User SL: The primary licensing is by User SLs, which are assigned on a “named user” basis which is different from AX4, AX2009 and AX2012. Microsoft Dynamics 365 has two types of SLs (the only exception is Marketing application, which is licensed per tenant – see licensing guide)
