Hi Team,
I would like to clarify on Extending Schema from different AD site.
Question 1 : Can we extend the Schema from a member server from different AD site by using the Domain Controller Parameter?
Setup /PS /IAcceptExchageServerLicenseTerms /Domaincontroller:Server1.XYZ.local
Note: Server1.XYZ.local has Schema Master role in different AD site.
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Before you extend your schema, there are a few things to keep in mind:
The account you're logged in as needs to be a member of the Schema Admins and Enterprise Admins security groups.
The computer where you'll run the command to extend the schema needs to be in the same Active Directory domain and site as the schema master.
If you use the DomainController parameter, make sure to use the name of the domain controller that's the schema master.
The only way to extend the schema for Exchange is to use the steps in this topic or use Exchange 2013 Setup. Other ways of extending the schema aren't supported.
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https://technet.microsoft.com/en-us/library/bb125224(v=exchg.150).aspx
Regards, Balgates