To use Microsoft 365 Apps, your users will need the appropriate license. 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. The Office Licensing Service, a part of Microsoft 365, keeps track of which users are licensed and how many computers they've installed Office on. If you remove a user's license (for example, if the user leaves your organization), any installations of Microsoft 365 Apps that the user had will go into reduced functionality mode. When single sign-on is enabled, Microsoft 365 Apps detects the user’s credentials and is activated automatically. All you have to do is purchase enough licenses, keep your Office 365 (or Microsoft 365) subscription current, and make sure your users can connect to the Office Licensing Service via the internet at least once every 30 days.

This automatic activation means you don’t have to keep track of product keys and you don’t have to figure out how to use other activation methods such as Key Management Service (KMS) or Multiple Activation Key (MAK).

Each installation is activated and kept activated automatically by cloud-based services associated with Office 365 (or Microsoft 365). Each license allows a user to install Microsoft 365 Apps on up to five desktops, five tablets, and five mobile devices. The information in this article also applies to Project Online Desktop Client and Visio Online Plan 2, which are licensed separately from Microsoft 365 Apps.īefore deploying Microsoft 365 Apps to users in your organization, you must first assign licenses to those users.

Microsoft 365 product key