Hello Community Folks, Thank you all so much for the incredibly clear and detailed guidance regarding "templateless" server provisioning in OpenStack. Your insights have been invaluable in clarifying OpenStack's core design philosophy. I now clearly understand that OpenStack, as a cloud platform, optimizes for rapid and scalable deployment from pre-existing Glance images, rather than supporting on-the-fly interactive OS installations from custom ISOs (as might be possible in traditional virtualization platforms like OLVM/vCenter). I also grasp that attempting to force an ISO-boot-and-install workflow in OpenStack is considered an anti-pattern due to its complexity and lack of native support. My focus will now entirely shift to leveraging this intended OpenStack workflow: Ensuring we have a robust, generalized Windows Server image in Glance that is pre-installed with Cloudbase-Init and VirtIO drivers. Utilizing the user_data mechanism extensively via the OpenStack SDK (or CLI) to perform all necessary post-boot customizations, including network configuration, firewall rules, and application installations. I appreciate you steering me towards the correct and efficient cloud-native approach. Best regards, Prem