How to Convert RODC to Child Domain or Tree Domain?

My Infra:

In House: Primary AD : UAE.TLS.LOCAL

Datacenter: Secondary ADC + File Server :UAE.TLS.LOCAL

And Exchange 2016 Server is running

Other Regions: China  : RODC (Win2012 R2) connected with 3 users.

Other Regions: Chennai CDCO1 and CD02 (Child Domain)  : MAA.UAE.TLS.LOCAL

So all servers are created in different sites and services with Subnets

Now we are planning to upgrade from :RODC  to Child Domain or Tree Domain. so is there any way to do migrations without any impacts of current users and profile?

what is the Best practice ,what you will suggest go for Tree Domain or Child Domain? what are the replication time will it take between Root Domain -> Child domain and Tree Domains?

is there any tool?
its quit urgent, if you reply immediately. it will be more appreciated. - Many Thanks in Advance

Regards

TLS
TLive SupportAsked:
Who is Participating?
 
Shaun VermaakTechnical Specialist/DeveloperCommented:
Now we are planning to upgrade from :RODC  to Child Domain or Tree Domain. so is there any way to do migrations without any impacts of current users and profile?
If the users account stays in same domain, no user profiles are impacted.

what is the Best practice ,what you will suggest go for Tree Domain or Child Domain? what are the replication time will it take between Root Domain -> Child domain and Tree Domains?
I am not a fan of multiple domains unless there is a clear business/technical requirement. So this depends. All I can say is if you change it now, you need to touch domain members

is there any tool?
Yes, ADMT
https://blog.thesysadmins.co.uk/admt-series-1-preparing-active-directory.html
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timgreen7077Exchange EngineerCommented:
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TLive SupportAuthor Commented:
Thank you Shaun
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timgreen7077Exchange EngineerCommented:
Answered author's question. Closing ticket and assigning points.
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