If you have Hyper-V host that are not part domain like in your DMZ or the computer client that needs to manage the hyper-v host is not part of the same domain; you may encounter this error.
This is a very annoying error and if you follow the instructions it would tell you how to fix it. In many cases you need to change the local group policy on the client machine not the Hyper-V host.
If you go to the path you need to enable “Allow delegation fresh Credentials with NTLM-only server authentication”
When you double click on the policy you will get the following window
Make sure you enable the policy and add the Hyper-V host.
Now this is where a lot of people make a mistake
DO NOT DO THIS
Remember Hyper-V Manager connects over the WSMAN comtrol channel plus. You may need other protocols please reference the following Technet document
After you make this small change you can connect to the Hyper-V host with the Hyper-V management on your client