If you’re interested in Microsoft 365 Business then there’s an FAQ which may be useful. From a licensing perspective it answers questions such as: Can I add Office 365 Add-ons to Microsoft 365 Business (Yes); Can I add Phone System and Calling Plans (No); and can Microsoft 365 Business customers create hosted Windows 10 VMs (No).

Find the FAQ here: http://bit.ly/2wfBH7c.