windows-update – Windows Server 2016中的“延迟功能更新”是

Long-term Servicing Branch

Specialized systems—such as PCs that control medical equipment,point-of-sale systems,and ATMs—often require a longer servicing option because of their purpose. These devices typically perform a single important task and don’t need feature updates as frequently as other machines in the organization. It’s more important that these devices be kept as stable and secure as possible than up to date with user interface changes. The LTSB servicing model prevents Windows 10 Enterprise LTSB devices from receiving the usual feature updates and provides only quality updates to ensure that device security stays up to date. With this in mind,quality updates are still immediately available to Windows 10 Enterprise LTSB clients,but customers can choose to defer them by using one of the servicing tools mentioned in the section Servicing tools.

资料来源：https://technet.microsoft.com/en-us/itpro/windows/manage/waas-overview

这里的重要信息是“LTSB服务模型[…]仅提供质量更新[…]但客户可以选择推迟它们”

快速提示质量更新如何：

Quality Updates

[…] include security,critical,and driver updates. Windows Update for Business also treats non-Windows updates (such as those for Microsoft Office or Visual Studio) as Quality Updates. These non-Windows Updates are known as Microsoft Updates and devices can be optionally configured to receive such updates along with their Windows Updates.

https://technet.microsoft.com/en-us/itpro/windows/manage/waas-manage-updates-wufb

根据我之前解释的方式直接回答您的问题：LTSB仍为您提供质量更新.延迟更新使您有机会在以后安装Microsoft更新(这是质量更新的一部分),而不是在Windows Update提供后立即安装.请注意,根据this explanation by Microsoft,安全更新不受该设置的影响.

我没有Server 2016的源代码,但我认为技术基础应与Windows 10中的相同.