Dynamics NAV, formerly known as Microsoft Navision, has experienced multiple version updates. It is significant to remember that versions before Navision 2009, Dynamics NAV 2015, 2016, 2017, and 2018 are no longer supported. This indicates that Microsoft will no longer be supporting these versions or offering updates or fixes. Upgrading to a supported version—like Dynamics 365 Business Central—is advised in order to guarantee ongoing maintenance as well as access to the newest features and security patches.