Multiple Exchange 2016 server in one Domain

We are deploying an Exchange 2016   server  in one Forest & one domain name but in multiple sites.
On Exchange 2016  ( Main site)
2nd Exchange       ( 2nd site )

   ( these two server will be  in DAG  )

but 5 other site will have separate Exchange server 2016 but will be same domain.  but i want to know the mail flow between these site.  only the member of that site will have there mailbox in there server only. all site will have there different IP schemes.  

Any advice to make there exchange environment error free.  waiting for you reply.
P VStorage & Virtualization ConsultantAsked:
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MASEE Solution Guide - Technical Dept HeadCommented:
Hi Pankaj,
You have to configure AD sites and services properly on each site where there is Exchange server.

Based on this mails will route to each server respectively.
How many servers are Internet facing?
You have to configure separate send connector and update SPF based on the IPs if you have more than 1 site with  internet facing exchange which sends email out.

When you type Get-AdSiteLink you can see the costs on each site link. You can see cost 100 by default when you create an AD site. Do not change it until and unless you need a special routing system.
By default Exchange will use AD cost.
Please check this for an understanding of costs of AD site links and Exchange.


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AmitIT ArchitectCommented:
Only challenge is low bandwidth sites. If you have low internet speed on other locations. Then you can see issues, while doing mailbox moves or mailflow or connecting remotely.

If all sites are having high bandwidth, then you don't need to worry about anything else. Just Install Exchange on each sites with local DC/GC. Big NO to remote DC/GC.
MASEE Solution Guide - Technical Dept HeadCommented:
Amit bring one point out. Thanks Amit.
You should have domain controller in each ADSite where you have Exchange server.
P VStorage & Virtualization  ConsultantAuthor Commented:
Thanks MAS for yore repy
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