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# Retrieve all existing DHCP servers from AD
Get-DhcpServerInDC
# Retrieving all DHCP server settings
Get-DhcpServerInDC | % {Get-DhcpServerSetting -ComputerName $_.dnsname}
# Setting DHCP conflict detection
Get-DhcpServerInDC | % {Set-DhcpServerSetting -ComputerName $_.dnsname -ConflictDetectionAttempts 2}