Want to add a user to a local group in multiple computers ?
Try below steps.
Step 1. Copy Psexec.exe on your server. You can download it
from here.
Step 2: Create Servers.txt in the same location where
Psexex.exe resides and store the multiple computers IP.
Step 3 : Open Command prompt with Admin Privileges and
change directory to where Psexec.exe resides.
Step 4: Execute below command now
Psexec.exe @servers.txt NET.exe LocalGroup
Administrators domain\username /add
Above example is for adding the user to Administrators
group. If you need to add it to another group like Remote Desktop Users,
enclose it within quotes.
Psexec.exe @servers.txt NET.exe LocalGroup “Remote
Desktop Users” domain\username /add