How to Determine Whether your PC is being connected to a Domain Controller from Command Prompt (cmd)?

1. Type "set user" and Press "Enter" in the command prompt.
2. The result will show you:-
USERDNSDOMAIN=YourDNSDomain
USERDOMAIN=YourDomainName
USERNAME=YourLogonUsername
USERPROFILE=YourProfileDirectoryPath

How to Determine Which Domain Controller a PC is Using from Command Prompt (cmd)?

1. Type in that window "set logonserver" without quotes. Press "Enter" key.
2. Read the result of the output. The output will show you LOGONSERVER= and after the equals sign will be the name of the logon server.