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#set suffixes
$suffixes = "suffix1.int,suffix2.int,suffix3.int"
$command = @"
cmd.exe /C "wmic nicconfig call SetDNSSuffixSearchOrder ($domain,$suffixes)"
"@
Invoke-Expression -Command:$command -ErrorAction SilentlyContinue
#------------------------------------------------------------------------------
#reverse suffixes change
#Append Primary and connection specific DNS suffixes
#Append parent suffixes of the primary DNS suffix 
$command = @"
cmd.exe /C "wmic nicconfig call SetDNSSuffixSearchOrder"
"@
Invoke-Expression -Command:$command -ErrorAction SilentlyContinue
#------------------------------------------------------------------------------
#get those suffixes
$suffixResults = wmic nicconfig get DNSDomainSuffixSearchOrder