powershell delete aduser groupmemberchip of other childdomain - powershell

Question

script should delete a ADUser of all of his Groupmemberchips (including memberships in forestdomain and other childdomains), deactivate it and move it into another OU.
environment:
forest-domain: forest.com
child-domains: child1.forest.com
child2.forest.com
child3.forest.com
script is running in child1.forest.com
this is the script so far:
$username="testuser"
$groups=Get-ADPrincipalGroupMembership -Identity $username | where {$_.name -notlike "Domain Users"}
$getuser=Get-ADUser -Identity $username | select DistinguishedName
$userpath=$getuser.DistinguishedName
foreach ($group in $groups) {
Remove-ADGroupMember -Identity $group -member $username -Confirm:$false
}
Disable-ADAccount -Identity $username
Move-ADObject "$userpath" -TargetPath "OU=Deaktivierte Benutzer,DC=child1,DC=forest,DC=com"
actually it successfull deletes all group-memberchips of child1.forest.com but not of forest.com or child2.forest.com
This code is working properly:
$User=Get-ADUser "testuser" -server "child1.forest.com"
$Group=Get-ADGroup "SomeGroup" -server "forest.com"
Remove-ADGroupMember $Group -Members $user -server "forest.com" -Confirm:$false
I tried to combine these script-snippets but not yet successful.
I have an idea... to read the domain of the OU and pass it into the loop, but I dont get it working to read the OU in a way that I can use it.
Can someone help please?

Answer 1

found a solution, I query if the group exist in server:
$found=0
$servers=#("forest.com","child1.forest.com","child2.forest.com","child3.forest.com")
$username="testuser"
$user=Get-ADUser -Identity $username
$groups=Get-ADPrincipalGroupMembership -Identity $user | where {$_.name -notlike "Domain Users"}
foreach ($group in $groups) {
foreach ($server in $servers) {
$groupname=$group.name
$groupserver=Get-ADGroup $groupname -server $server
if($groupserver)
{
$group=Get-ADGroup $groupname -server $server
Remove-ADGroupMember $Group -Members $user -Confirm:$false -ErrorAction SilentlyContinue
$found=1
}
if ($found -eq 1){break}
}
}