Nachtrag PDF:Dynamics 365 Business Central on-premises Transition Upgrade Policy
Use of Old Version after Transition Upgrade To New Version
Once the new version goes into a production environment (e.g. process business operations or create new
transactions), customers may only access the transitioned (old) version to reference past transactions for
tax, audit, and/or reporting purposes. However, as soon as the license key for the new product version is
issued, customers will not be able to add users and/or modules directly to the transitioned version(s).