How does Dynamics 365 base + attach licensing work?

Microsoft prices the first Dynamics 365 app per user at the higher "base" rate. Each additional qualifying app for the same user is sold at the "attach" rate — typically about 70% less. This rewards users who span multiple Dynamics modules (Sales + Customer Service + Field Service).

The catches: only certain apps qualify as a base, and the attach price applies only to that same user. You cannot mix and match across the team. Plan the user-to-app mapping carefully — getting it wrong inflates the cost by thousands per year on a small team.

Still unsure?

Talk to a licensing specialist for a written, signed quote tailored to your environment.