I have 6 AD sites in US which are having child relationship with our site which is headquartered at NY
The sites have their own exchange server and DC in their site
All these sites have exchange 2007 servers.
They all have child relationship with our site.
And having netbios name as for ex. For Indiana it is ind.domain.lan
We have main site in NY which is domain.lan
We are promoting our exchange server 2007 to exchange 2013 in primary site in NY.
In this regard we want to collapse their child relationship we want all these sites to have netbios name as domain.lan which we have
We want them to have forest-forest relationship
So how can we do this
Do we need to build separate dc’s in their site and make netbios name same as domain.lan and do replication
or something else is required?