Manage Hyper-V of workgroup remotely

At Server Side

1. Setup a new user (without Administrator right)
2. Add the new user to "Hyper-V Administrator" group
3. Enable remote management
   

   Enable-PSRemotingEnable-WSManCredSSP -Role server
   

At Client Side

1. Make sure the service "Windows Remote Management" has been started and set to "Automatic" .
2. Trust the hosts to be managed.
   

   Set-Item WSMan:\localhost\Client\TrustedHosts -Value "fqdn-of-hyper-v-host" 

3. Enable CredSSP

   Enable-WSManCredSSP -Role client -DelegateComputer "fqdn-of-hyper-v-host" 

4. Use WinRM Quick Config
   

   winrm qc

5. Open Local Group Policy Editor
   Computer Configuration > Administrative Templates > System > Credentials Delegation > Allow delegating fresh credentials with NTLM-only server authentication
   Click Enable and add wsman/fqdn-of-hyper-v-host.

After the above settings, you should be able to connect to Hyper V hosts.

Reference:
https://docs.microsoft.com/en-us/windows-server/virtualization/hyper-v/manage/Remotely-manage-Hyper-V-hosts

https://community.spiceworks.com/topic/1874773-hyper-v-remote-management-from-windows-10-pro