Кстати, BASIC LICENSING REQUIREMENTS: All Microsoft Dynamics AX 2012 R3 customers need to license...

[ax_mct]

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For the Microsoft Dynamics AX 2012 R3 solution you need to license Server plus CALs:
 Microsoft Dynamics AX 2012 R3 solution functionality is licensed through the Microsoft Dynamics AX 2012 R3 Server license. Each running instance of the Microsoft Dynamics AX 2012 R3 Server software requires a Server license.
 Direct or Indirect Access to the Microsoft Dynamics AX 2012 R3 solution functionality by users or devices is licensed through CALs.
Every user or device accessing the solution functionality—whether directly or indirectly—must be covered by a CAL.

Однако есть еще определение насчет External Users. Конкретно
Your customers do not require a CAL to access your Microsoft Dynamics AX 2012 solution to manage their accounts and orders.
Легальность и судьба наших интеграций как непрямого доступа.