We are using JNLP to connect Windows Jenkins slaves. Problem is that current solution requires you to modify script which downloads the file from Jenkins. The problem is that the script is injected on image setup and therefore it needs to be changed prior generation. This is insufficient as multiple teams will be using this project and FUSEQE currently have 2 separate Jenkins instances (which would require a different Windows image for each instance). There is a way of making a generic script which will have URL injected on launch from cloud-init.