Admin users can delete offline computers from Portal. Computers cannot be deleted if they are online.
If you delete a Hyper-V environment from Portal, you must undelete the environment before you can recover jobs and settings from the Hyper-V Agent. See Undelete Hyper-V environments and Recover jobs and settings from an offline Hyper-V Agent.
To delete offline computers:
1. On the navigation bar, click Computers.
The Computers page shows registered computers.
2. Select the check box for each computer that you want to delete.
3. In the Actions list, click Delete Selected Computer(s).
4. In the confirmation dialog box, click Yes.
5. In the Success dialog box, click Okay.