If you ever have the need to add multiple UPN or SPN suffixes to your forest here is a simple script which will do it in no time. Just add the suffixes to a text file, one per line works the best :).
For UPN Suffixes
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$domains = Get-Content -Path C:\UPNList.txt
$forest = Get-ADForest
$currentUPN = $forest.UPNSuffixes
foreach ($domain in $domains) {
if($currentUPN.Contains($domain) -eq $true){
echo "Already exist: $domain"
}else{
echo "Adding UPN: $domain"
Set-ADForest -Identity $forest.Name -UPNSuffixes @{Add=$domain}
}
}
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For SPN Suffixes
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$domains = Get-Content -Path C:\SPNList.txt
$forest = Get-ADForest
$currentSPN = $forest.SPNSuffixes
foreach ($domain in $domains) {
if($currentSPN.Contains($domain) -eq $true){
echo "Already exist: $domain"
}else{
echo "Adding SPN: $domain"
Set-ADForest -Identity $forest.Name -SPNSuffixes @{Add=$domain}
}
}
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