Processes in Microsoft 365 for setting up Office apps, redeeming product keys, and activating licenses.
Hi Morris,
Welcome to the Answers community.
According to the system requirement, Microsoft 365 is supported on Windows Server 2016.
As you have a Microsoft 365 Apps subscription (*formerly Office 365 Business)*and wants to install Office on Windows Server 2016, you must assign each user a valid license so they can use Microsoft 365 services.
It’s up to you whether you want to buy Microsoft 365 subscription or volume license. It depends on your need. To use any of these services, as user must be assigned a license.
If you have any question, please let me know. Have a nice day and stay safe 😊
Regards,
Neha