Manage a DC remotely via powershell on a computer not joined to the domain

What should be done? Is it possible?

From serverfault Parsa

• You might be able to do this although I'm not 100% sure if you can specify a trusted host that is not a domain member for a DC.

  From about_remote_troubleshooting

  When the local computer is not in a domain, the following procedure is required for remoting.

  1. Configure the computer for HTTPS transport or add the names of the
     remote computers to the TrustedHosts list on the local computer.
     For instructions, see "How to Add a Computer to the TrustedHosts
     List" below.
  
  2. Verify that a password is set on the workgroup-based computer. If a
     password is not set or the password value is empty, you cannot run
     remote commands.
     To set password for your user account, use User Accounts in Control
     Panel. 
  
  3. Use the Credential parameter in all remote commands.
     This is required even when you are submitting the credentials
     of the current user.
  

  and

  To view the list of trusted hosts, use the following command:

  get-item wsman:\localhost\Client\TrustedHosts
  
  To add the names of particular computers to the list of trusted hosts,
  use the following command format:
  
  set-item wsman:\localhost\Client\TrustedHosts -value <ComputerName>
  

  From Helvick