How to manage machines in a workgroup
If you have machines in a domain, it is easy to execute remote administration (through gpo, script,…). Regarding the positions in workgroup, the task turns out to be more complex. Indeed, the latter only contain their own GPOs and their account base.
Thus it is possible to use winrm to perform remote administration. In order to secure the communications betweens the two computers (or computer and server) it is possible to encrypt exchanges using the ssl Protocol.