Add / Remove users from AD groups with Powershell

For a users list:

1 - create a file (ex: add-users.ps1);
2 - paste the commands and change file name and group;
3 - the first line of users list must be UserName;
4 - Run the ps1 file with admin user.

Import-module ActiveDirectory
Import-CSV "C:\list_of_users.csv" | % {
Add-ADGroupMember -Identity GROUP -Members $_.UserName
}
pause


For add only one user

Add-ADGroupMember -Identity GROUP -Members USER


To remove users, change Add-ADGroupMember to Remove-ADGroupMember