Should I add one DC to each facility while acquisition is in progress?

My company is in a mode of acquiring more companies. I'm here soliciting your recommendation or a rule of thumb for how to deploy/expand my AD domain controller. Should I simply add one DC to a newly-acquired facility? If I do that, the total number of DC would be more than 5. Does it matter? -- Since I remember I was told to keep maximum two DCs. What should I do?
CastlewoodAsked:
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Seth SimmonsSr. Systems AdministratorCommented:
depends...
number of people, number of locations can usually dictate your topology
ideally there could be 2 at each site for redundancy
you could get away with 1 if there is another in a different site though you would have a bit of latency due to lack of a DC at a site and clients would have to talk to a system in a different site
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CastlewoodAuthor Commented:
We will have five facilities where each facility has about 30-50 users.
So ideally I would have 10 domain controllers for my single domain where each facility has 1 - 2 DCs, correct?
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Seth SimmonsSr. Systems AdministratorCommented:
not a bad idea
i would try to virtualize where possible
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CastlewoodAuthor Commented:
so it is recommended to have 10 domain controllers per one domain among five locations?
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Seth SimmonsSr. Systems AdministratorCommented:
not necessarily; you could have 1
only drawback as i mentioned before about latency when trying to reach out to other sites over the wan
if that isn't a huge concern then 1 is fine
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