To access Dynamic Ship functions, whoever handles your NAV or Business Central security needs to set the users up with both DSHIP-USER and IWORKS COMMON permissions to be able to use Dynamic Ship. Users that need to access Dynamic Ship setup can be given DSHIP-ADMIN permission. Each user needs to be added to the Insight Works Users list with the Manage License Plates option enabled.
In NAV, you can find all the Dynamic Ship menus in the Dynamic Ship Department page. In Business Central, you can switch to the Shipping and Receiving – Warehouse Management System role to see the Dynamic Ship menus. You can use the Dynamic Ship functions under other roles, but you would need to search for each screen you want to use.