Great news! Last week Microsoft Azure connector for Windows Azure Pack was released for the public. It is available on GitHub as an Open Source.
This connector allows every hoster to add Azure VM management functionality to its current Azure Pack portal. This is what service providers asked Microsoft for years - single management panel for hoster-based VMs and for Azure-based VMs. Now hosters can offer Azure VMs via CSP to their tenants as an addition to their current IaaS.
Feel free to install Azure connector, it should not take more that 1-2 hours.