Domain Architecture Changed

Hi guys,

Our company will change the domain architecture . You can see the current domain architecture from the following picture .

Our HQ root site will be removed in future due to some reasons. And will only leave B1 , B2 , B3 child domain .

We will plan to keep the DC of forest A and its child domains (B1 ,B2 ,B3). Does microsoft have any solutions or reference materials about the

architecture changed .

Thank you in advance .

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