How many Domain Controllers required to support Branch sites?

We are planning to place 1 Domain Controller at HQ
with one RODC at each branch location.
There would be no more than 10 users at each branch location, none of which would be physically located at the branch site.  They would all be transient.
My question is with only 5 possible Branch locations will 1 DC be able to support this environment?  I realize
normally there would be two DCs at HQ for redundancy
but that is not an issue for this scenario.
Thank you,
Barb
bc

Hi,
About placing a domain controller in the branch office or not. This is decided mostly by the quality of the wide area network (WAN) link between your branch office and the hub site. If the WAN is highly reliable and available and if the performance of directory-enabled
applications and logons in the branch office is acceptable, you do not have to place a domain controller at that branch office location.
Deciding Which Type of Domain Controller Meets the Needs of a Branch Office Location
http://technet.microsoft.com/en-us/library/dd736142(v=ws.10).aspx
Regards.
Vivian Wang

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