RE: Dynamics NAV - Online Version availability and Future Plan?
There are three parts of this story:
1. Where the physical solution will be located (you install your own copy of database and technically have full access to developments and customizations):
a). on-premise, hosted on your local server
b). private cloud, as if you would put your own server to some datacenter, but still have access to that as your own physical server
c). public cloud, e.g. in Azure, where you would basically rent some computing space and install NAV pretty much the same as in both previous options
2. What types of licenses would you use:
a). perpetual licenses, when you will make one-time immediate license purchase and use it as you want
b). subscription licenses, when you will "rent" the license, by paying much smaller amounts monthly fee for the quantity of users, needed this month
3. Dynamics365, which is a sort of combination of 1c and 2b, but you would use is as a sort of "out-of-the-box" solution, without access to major developments and customization, at least the way that everybody got used to (so, it is pretty much a SAAS model).