Exchange mailbox creation for child domain

Hi Friend,'
I want to add a child domain,some thing like group.domain.com. We have an exchange 2013 in the network, my requirement is to create 50 users in the child domain and create mail accounts for this child domain users. 
My main challenge is to create the CDC and my exchange have the name space domain.com and my CDC is group.domain.com,but i want to add users in mailserver for the CDC users as [email protected]
I know how to add additional suffix in exchange and AD :
http://www.sysguru.in/2014/09/creating-additional-suffixname-space-in.html
Is it possible to use the same scenario for my CDC users also?
Regards

Hi,
In your case, if you want to add additional suffix in your Exchange server in the child domain, you need to add the root domain as an accepted domain.
Here is an article about accepted domain for your reference.
Accepted domains
https://technet.microsoft.com/en-us/library/bb124423(v=exchg.150).aspx
Hope this can be helpful to you.
Best regards,
Amy Wang
TechNet Community Support

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