Can I have multiple NTP Servers in one windows domain?

I am working on setting up a central windows NTP server for my domain windows 2003 R2. I will use a GPO to force computers to update from the correct server.

My question is. Is it acceptable to have multiple NTP servers in one domain, according to MS best practice? I am unable to locate definitive documentation.

The default is the PDC emulator obviously only 1 of the servers can be the PDC emulator, the other two would be DCs.

I am considering having one in each geographical area i.e. North America, Europe, Asia Pacific, etc. and will use a GPO in each region to point the computers to the correct server.
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oBdAConnect With a Mentor Commented:
There is usually no need to do anything except for running a single command (two if you want to resync immediately) on the PDC emulator:

w32tm /config /manualpeerlist:,0x8 /syncfromflags:MANUAL /update
w32tm /resync

Replace with a time server geographically near you (see list below), and make sure that UDP port 123 outbound is allowed in the firewall.
A list of the Simple Network Time Protocol (SNTP) time servers that are available on the Internet

That's all. DCs will sync *by* *default* with the PDC emulator, and domain members will sync *by* *default* with the DC authenticating them (which is not necessarily the PDCe!).
In other words: if you have your AD Sites and Services setup correctly, there is no need to do anything with GPOs.
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