Just a quick one, Had to do this for a customer recently where there was a bunch of users in an existing response group and they needed to be copied to a new one.
Instead of copying them one by one just run this and you will have time left over for coffee.. (or writing this blog post)
$OldGroup = (Get-CsRgsAgentGroup -Name "Helpdesk Group")
$NewGroup = (Get-CsRgsAgentGroup -Name "Helpdesk Overflow")
Foreach ($User in ($OldGroup.agentsbyuri))
{
$NewGroup.AgentsByUri.Add($User.AbsoluteUri)
}
Set-CsRgsAgentGroup -Instance $NewGroup