Cases in which Windows 10 Enterprise with Software Assurance was purchased as part of a Microsoft Agreement, but the SA was not extended, will impact the deployed Windows 10 Enterprise version as well. When SA is discontinued, customers are only entitled to use Windows 10 Enterprise LTSB. The implications are as follows:
a) Companies wishing to migrate from a lower version to Windows 10
If Software Assurance (SA) is not extended, companies that acquired the right during the contract term to install Windows 10 will only be entitled to roll out Windows 10 LTSB.
b) Companies that already use Windows 10 Enterprise E3 or E5
Once Software Assurance for Windows 10 Enterprise (E3/E5) comes to an end, customers have a 90-day grace period to switch their current installation to Windows 10 Enterprise LTSB. To do this, they need to uninstall their Windows 10 Enterprise (E3/ E5) version and then deploy Windows 10 LTSB. This procedure is necessitated by the very significant differences between this version and Windows E3/ E5, which make reinstallation unavoidable.