Dynamics 365 Business Central adds new features, and on-premises features often require Office 365 connectivity.

Timeline shows current and upcoming releases and retirements of Dynamics GP on-premises software.

Dynamics GP released an evergreen version that dropped the version number and requires accepting annual updates and an annual maintenance plan.

Dynamics 365 Business Central, now available on-premises, succeeds NAV 2018, but introduces disruptive user and developer features that will require retraining and rewrites

Timeline shows current and upcoming online and on-premises versions of Dynamics 365 Business Central, the successor to Dynamics NAV