Powershell – Add Users to Security Group

Powershell to add users to groups with Get-ADGroup and Add-ADGroupMember cmdlets.

Add single user to security group:

Get-ADGroup -Identity "SomeGroup" | Add-ADGroupMember "some.user"

Add multiple users from a text file to security group, one user per line.

$list = Get-Content -Path "c:\tmp\list.txt"
$group = Get-ADGroup "SomeGroup"
ForEach ($user in $list) { Add-ADGroupMember $group $user }