NIKDY NEZAKAZOVAT IPv6 - nenaskočí NLA, Exchange Topology Server atd.
netdom /query fsmo
net stop w32time
w32tm /config /syncfromflags:manual /manualpeerlist:"ntp.cesnet.cz, 2.pool.ntp.org"
w32tm /config /reliable:yes
net start w32time
w32tm /query /configuration
w32tm /resync