For the proper communication between the Veeam Hyper-V MP components, open the following ports in the firewall:
Computer running Ops Mgr Console
Required to enable data collection for Veeam Hyper-V Task Manager.
Veeam Virtualization Extensions Service
Required for communications between Veeam Virtualization Extensions Service and Veeam Virtualization Extensions UI (port number can be chosen during setup).
Workstation Web Browser
Required to use Veeam UI from remote web browser (port number can be chosen during setup).