Question about forest root DCs and Azure

Don Harvey
Don Harvey used Ask the Experts™
We have a forest root domain with 1 domain (we used to have 2 but we just decommissioned a domain). In this domain we have  3 sites containing DCs and we are getting ready to implement our first Azure cloud DC. I am looking for some advice on this.

The current 3 sites containing DCs contain both root and child domain DCs. One of them is our DR site. The other 2 are our main corporate HQ and our off site datacenter. We have 1 forest trust with an offshore partner configured at the forest level.

We soon plan to spin up a DC in Azure for our domain. Is there any reason that I need to also spin up a forest root DC there? Would we do this because of forest trusts? Should someone do that for uniformity? Cost is a factor.

Thanks in advance!
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Is there any reason that I need to also spin up a forest root DC there?
No, not unless you want a forest root DC in Azure. In this scenario Azure is simply another data centre location. There is no requirement to have a root DC in every site where a child domain has a DC.

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