Sometimes a Host cannot be added to VMM, especially when there is a cluster involved. The steps below should resolve basic connectivity issues when adding a new host. For information about Hosts If this does not work, see the article just prior to this ‘Managing Hyper-V hosts using Virtual Machine Manager fails with Error: 0x8033803b. Extra remediation steps.’
Adding a Host and Enabling Connectivity
Step 1: Advanced Firewall settings
Open Advanced Firewall settings. Choose ‘Inbound Rules.’ Scroll to the bottom and make sure the five items below are enabled. Below only Windows Remote Management is enabled.
The image below shows all items enabled.
Step 2: Enable File Sharing Role
In ‘Roles and Features’ place a check in ‘File Server’. Reboot is optional but recommended.