Microsoft’s new enforcement regime for Dynamics 365 Finance & Operations licensing is the biggest recalculation of access rights since the product launched. Beginning January 15, 2026 every customer hits a 15-day validation window after its renewal or anniversary date. During that period Microsoft checks whether a user’s license matches every role, duty, and privilege they can reach. Miss the deadline and those users lose access entirely until IT sorts it out. Combine that with a price model that charges for access rather than actual usage and the result is predictable: most organizations are about to be told to buy even more licenses than they have today.