To use the desktop version of Microsoft 365 in Business and Business Standard plans, you must be on one of the following operating systems:
PC: Windows 10, Windows 8.1, Windows 8, Windows 7 Service Pack 1, Windows Server 2016, Windows Server 2012 R2, Windows Server 2012, or Windows Server 2008 R2
Mac: Mac OS X 10.10 or later
For the best experience, use the latest version of any operating system.
If you are running a different operating system, remember that you can still use Microsoft Online, browser-based versions of your favorite Micro