On-premises software update policies
https://docs.microsoft.com/en-us/dyn...pdate-policies
The customer is in full control of its on-premises deployments and
must follow this policy. The customer is in control of installing updates in its on-premises environments. Microsoft will support the Dynamics 365 for Finance and Operations (on-premises) software through December 31, 2027, at a minimum, but
only if the customer keeps the deployed software current according to this policy.
Critical fixes and non-critical updates are handled in the following way:
Critical fixes – Critical fixes include security fixes and any fixes that are required to support reliability and availability. Critical fixes will be made available in the latest platform update version.
Non-critical updates –
Customers must update to the most current Finance and Operations platform and financial reporter version to deploy non-critical updates.
Как понимаю On-premises это не про код, а про данные. Хотите держать данные у себя - OK. Но как платформа разработки - не предназначена.
P.S. Не совсем я корректен. Конечно официально оно предназначено. Но практически лишено смысла по причине отсутствия полного контроля.