Exchange Schema Upgrade

Hi All,

I am planning to upgrade schema for Exchange 2013 in my AD Domain that is part of forest with multiple Domains. I plan to follow the below.

First Exchange installation in the Forest.

=> Root Domain
Setup.exe /PrepareSchema
Setup.exe /PrepareAD /OrganizationName:XXXXXX

=> Child domain(The Domain that will have Exchange servers installed)
Setup.exe /PrepareDomain

I hope this is correct.