For more information, see End of support resources for Office. But, running Microsoft 365 Apps on these older operating systems isn't supported. For more information, see Update to enable TLS 1.1 and TLS 1.2 as default secure protocols in WinHTTP in Windows.

Some older operating systems, such as Windows 7 Service Pack 1 (SP1) and Windows Server 2012, need an update applied to enable TLS 1.2 by default. To activate Microsoft 365 Apps, TLS 1.2 must be enabled by default on the operating system. If your users have dedicated computers and no other users work on those computers, you use product key activation for Microsoft 365 Apps. Using Microsoft 365 Apps with shared computer activation enabled doesn't count against that limit. Normally, users can install and activate Microsoft 365 Apps only on a limited number of devices, such as 5 PCs. Shared computer activation is required for scenarios where multiple users share the same computer and the users are logging in with their own account. Multiple users access an instance of Office that is hosted through Remote Desktop Services (RDS).Multiple employees use Office on a computer that's located in a conference room or some other public space in the company.Five employees connect remotely to the same computer to run Office.Fifteen nurses at a hospital use Office on 10 different computers throughout the day.Three workers at a factory share the same physical computer, with each worker using Office on that computer during their eight-hour shift.Here are some examples of supported scenarios: Shared computer activation lets you deploy Microsoft 365 Apps to a computer in your organization that is accessed by multiple users. For information about activating a personal copy of Office, see Activate Office. The information in this article is intended for administrators and IT Pros.

Office 365 e3 5 devices