lanciare dalla powershell di Windows server 2012 eseguita come amministratore:

netdom query fsmo

oppure

netdom /query fsmo

lanciare come sopra:

get-

adforest | fl globalcatalogs

registrare la dll seguente:

regsvr32 schmmgmt.dll

eseguire lo snap in

mmc

menù file
add/remove snap-in…
active directory schema
add
ok
a questo punto abbiamo a disposizione lo strumento per gestire il trasferimento dello schema master. ss

First, locate your PDC Server. Open the command prompt and type:

netdom /query fsmo

Log in to your PDC Server and open the command prompt.
Stop the W32Time service:

net stop w32time

Configure the external time sources, type:

w32tm /config /syncfromflags:manual /manualpeerlist:”0.ntp1.inrim.it, 1.ntp2.inrim.it”

Make your PDC a reliable time source for the clients. Type:

w32tm /config /reliable:yes

Start the w32time service:

net start w32time

The windows time service should begin synchronizing the time. You can check the external NTP servers in the time configuration by typing:

w32tm /query /configuration

Check the Event Viewer for any errors.