Creating shadow principals

$g = Get-ADGroup -Identity "Domain Admins" -Server blue.goodworkaround.com
New-ADObject -Type msDS-ShadowPrincipal -OtherAttributes @{
    "msDS-ShadowPrincipalSid" = $g.SID
} -Path "CN=Shadow Principal Configuration,CN=Services,CN=Configuration,DC=red,DC=goodworkaround,DC=com" -Name "BLUE.Domain Admins"
$g = Get-ADGroup -Identity "My Global Group" -Server blue.goodworkaround.com
New-ADObject -Type msDS-ShadowPrincipal -OtherAttributes @{
    "msDS-ShadowPrincipalSid" = $g.SID
} -Path "CN=Shadow Principal Configuration,CN=Services,CN=Configuration,DC=red,DC=goodworkaround,DC=com" -Name "BLUE.My Global Group"