While I was doing a cross forest migration in a customer’s environment I had to make sure that of some computers' logged in users before starting the migration process due to the customer’s policy how Computer hostnames are used.

There was about 500 computers, most of these computers don’t use their users’s names but company’s name and then a number e.g. (PC5123).

Luckily Mark Russinovich has provided the great PSTOOLS for administrators to work remotely and find out everything about user’s computers in domain without having to go physically or interact with the users.

So I had to download the tools from this link and use the following command to get the logged in user.

wmic /node:"smart0498" ComputerSystem GET UserName

Hope you find this useful