The Microsoft Azure Windows VM Agent is a secure, lightweight process that manages virtual machine (VM) interaction with the Azure fabric controller. The Azure Windows VM Agent has a primary role in enabling and executing Azure virtual machine extensions. VM extensions enable post-deployment configuration of VMs, such as installing and configuring software. VM extensions also enable recovery features such as resetting the administrative password of a VM. Without the Azure Windows VM Agent, you can't run VM extensions.
https://learn.microsoft.com/en-us/azure/virtual-machines/extensions/agent-windows
