repadmin

This command syncs all DC to this one 

repadmin /syncall RHSC-00-VSRV18 /d /e 

repadmin /syncall RHSC-00-VSRV18 /APeD 

repadmin /syncall RHSC-00-VSRV18 /d /e 

pause 

Powershell 

Get-ADDomainController -Filter * | %{repadmin /syncall /edjQSA $_.hostname}