https://www.theverge.com/2018/9/6/17826748/microsoft-windows-10-support-cycle-changes-september-2018

Microsoft is altering its support cycle for businesses running Windows 10. The software maker currently releases two major Window 10 updates per year, and businesses have 18 months before they need to move from one to another more recent update. It’s all part of Microsoft’s “Windows as a service” push, and it’s designed to ensure Windows 10 gets new features instead of the previous three-year cycle for Windows releases. But it’s been a little too fast for some businesses.

Some businesses have complained that they need more time and flexibility to update Windows 10, and IT admins are tasked with ensure apps work with the latest update. Microsoft is releasing new cloud-based tools to ease app compatibility testing, and the company is also giving IT admins more time to update. All currently supported feature updates of Windows 10 Enterprise and Education editions will be supported for 30 months from their current release. The existing policy is 18 months, so this bump brings support closer to what IT admins were used to in the Windows 7 and earlier days.