Hi Everyone,
My scenario:
Datacenter #1 - AD Site "A"
-4 ISP internet connections. (Outbound independently)
-2 DCs GC (FSMO) Internal DNS
-2 DNS Servers - External DNS hosted into a DMZ (SPF / MX / PTR records pointing to Site A (mailflow))
-1 Exchange 2010 SP3 UR30.
-2 Exchange EDGE Servers in DMZ.
-500 users
DNS Namespace: Outbounded model
Mail services (DNS): webmail.company.com / autodiscover.company.com
MX´s: 2 mail.company.com | 2 mail2.company.com (2 on 1 ISP and 2 on another ISP for redundancy)
Datacenter #2 - AD Site "B"
-2 ISP Internet connections (Outbound independently)
-2 DCs GC
-Plan to install 1 Exchange 2016 (Not yet installed, Without Exchnage Server)
Connections: 1 VPN and 1 MPLS connecting Site A to Site B.
I need to install Exchange 2016 as part of an Exchange Upgrade, and i need to install it directly on Site B because it has more hardware resources and more employee´s.
Questions :
1 - Can i install Exchange 2016 directly in Site B without migrate any user mailbox and while Exchange 2010 SP3 still reside in a main site A without changing, afecting or disrupting mail flow or needed to pointing the DNS records to Site B ? > ignoring the fact of the previous and immediate Schema/Ad/Domain updates from remote share in FSMO DC, and configuration of the SCP, the services and the SSL certificate.>
2 - What´s happens to the actual mail flow, regarding on that exchange 2010 cannot do proxy up to exchange 2016 ?
I need to change all my DNS records (SPF / MX / ISP´s PTR records) to point to the second datacenter in Site B (Exchange 2016) for dont break mail flow, even though no mailboxes have yet been migrated ?
3 - If Question 1 not apply, When we are ready to migrate the mailboxes, this DNS changes needs to be done before or in parallel while mailbox is moved from Site A (Exch.2010) to Site B (Exch.2016) ?
4 - If i´m wrong, i need to firstly install Exchange 2016 directly in Site A where Exchange 2010 reside and change the firewall port rule to point to Exchange 2016 ?
Any additional comments about my inquiries or the steps necessary to not cause any interruption are welcome.
Thanks.