Home > Integrated Products > Integrated System for Azure Stack Hub > White Papers > Dell EMC Integrated System for Microsoft Azure Stack Hub Manual Firmware & Update Process - Builds 1710 - 1906 > Overview of OEM extension package
The Dell EMC OEM extension packages are cumulative. The OEM extension package uses the Microsoft Azure Stack Hub software framework to apply the operating system (OS) drivers to the scale unit nodes.
Note: OEM extension package for release 1906 was the last package to only update scale unit node OS drivers. Starting with the 1908 build (there was no 1907 build), both OS drivers and scale unit node firmware are updated with the OEM extension package.