Application updates

Application updates in VMSS should not be executed manually. They must be executed as part of release management and pipelines using automation. Moreover, the update should happen one application instance at a time, not affecting the overall availability and scalability of the application. Configuration management tools, such as the desired state configuration, should be deployed to manage application updates. The DSC pull server can be configured with the latest version of the bits and they should be applied on a rolling basis to each instance.