Dana D
asked on
Exchange Server 2007 – 2010 coexistence - figuring out external DNS
I have introduced a 2010 exchange server to my exchange 2007 environment and am working to get them to coexist.
I have ONLY 1 exchange 2007 server with all roles installed on it for email to function properly. I have introduced a new exchange 2010 server and it will be setup the same exact way with all roles installed on ONLY itself for email to function properly.
I have successfully moved the OAB, Public Folders and 1 test mailbox to the new exchange 2010 server and now need to setup OWA and autodiscover to be reachable externally.
right now it works internally properly!
Meaning that if i open a browser inside the network and goto to the internal FQDN (https://mail.mydomain.com/owa) for the new 2010 exchange server and try to log in as a mailbox user on the exchange 2010 server it will open their mailbox and if I login as a user whos mailbox is NOT on the exchange 2010 server (and the mailbox resides on the exchange 2007 server) it will redirect me to the exchange 2007 OWA site and i can log in with no problems and see mail.
Now according to this article I need to somehow swap the DNS names and change the name of my existing exchange server:
https://www.simple-talk.com/sysadmin/exchange/upgrade-from-exchange-2007-to-exchange-2010---part-ii/
can someone be a little more clear about what i need to do in my particular case?
Here is my current setup info:
exchange 2007 FQDN server name: exchange07.mysubdomain.myd omain.com
external 2007 OWA address: https://exchange07.mydomain.com/owa
new exchange 2010 FQDN server name: mail.mysubdomain.mydomain. com
What i would like my external address to be for this: https://mail.mydomain.com/owa
Please note that i am currently redirected to exchange 2007 OWA site when I enter the address above externally (https://mail.mydomain.com/owa) but i am unable to login to the test mailbox that i have moved to the exchange 2010 server - it basically shows this page when i try to log in:
I am however able to log in externally to that address above (https://mail.mydomain.com/owa) for a mailbox that resides on the exchange 2007 server with no problems. I find this strange as I have always given out https://exchange07.mydomain.com/owa For OWA access info....
So does this mean there is an existing redundant A record in my external DNS that is going to my exchange 2007 server?
I have ONLY 1 exchange 2007 server with all roles installed on it for email to function properly. I have introduced a new exchange 2010 server and it will be setup the same exact way with all roles installed on ONLY itself for email to function properly.
I have successfully moved the OAB, Public Folders and 1 test mailbox to the new exchange 2010 server and now need to setup OWA and autodiscover to be reachable externally.
right now it works internally properly!
Meaning that if i open a browser inside the network and goto to the internal FQDN (https://mail.mydomain.com/owa) for the new 2010 exchange server and try to log in as a mailbox user on the exchange 2010 server it will open their mailbox and if I login as a user whos mailbox is NOT on the exchange 2010 server (and the mailbox resides on the exchange 2007 server) it will redirect me to the exchange 2007 OWA site and i can log in with no problems and see mail.
Now according to this article I need to somehow swap the DNS names and change the name of my existing exchange server:
https://www.simple-talk.com/sysadmin/exchange/upgrade-from-exchange-2007-to-exchange-2010---part-ii/
can someone be a little more clear about what i need to do in my particular case?
Here is my current setup info:
exchange 2007 FQDN server name: exchange07.mysubdomain.myd
external 2007 OWA address: https://exchange07.mydomain.com/owa
new exchange 2010 FQDN server name: mail.mysubdomain.mydomain.
What i would like my external address to be for this: https://mail.mydomain.com/owa
Please note that i am currently redirected to exchange 2007 OWA site when I enter the address above externally (https://mail.mydomain.com/owa) but i am unable to login to the test mailbox that i have moved to the exchange 2010 server - it basically shows this page when i try to log in:
I am however able to log in externally to that address above (https://mail.mydomain.com/owa) for a mailbox that resides on the exchange 2007 server with no problems. I find this strange as I have always given out https://exchange07.mydomain.com/owa For OWA access info....
So does this mean there is an existing redundant A record in my external DNS that is going to my exchange 2007 server?
ASKER
Thanks for your help Balal!
So if i need to:
Change DNS to repoint mail.company.com to the IP of 2010 CAS
then that leads to other questions about my firewall port forwarding rule that i currently have setup for my existing exchange 2007 server.
How do i handle this?
Can i use the same external WAN IP address for my port forwarding rule and just update the port forwarding rule to point to the internal static ip of exchange 2010 server?
Or do i need to have another availble static IP address and create a brand new port forwarding rule to point port 25 traffic to the new exchange 2010 server?
So if i need to:
Change DNS to repoint mail.company.com to the IP of 2010 CAS
then that leads to other questions about my firewall port forwarding rule that i currently have setup for my existing exchange 2007 server.
How do i handle this?
Can i use the same external WAN IP address for my port forwarding rule and just update the port forwarding rule to point to the internal static ip of exchange 2010 server?
Or do i need to have another availble static IP address and create a brand new port forwarding rule to point port 25 traffic to the new exchange 2010 server?
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ASKER
It worked - Thanks!
•Create new DNS record and point legacy.company.com to IP of 2007 CAS
•Change ExternalURL on 2007 owavirtualdirectory to legacy.company.com
•set ExternalURL on 2010 owavirtualdirectory to mail.company.com
Based on your post, sounds like I do not need to change 2007 Outlook Anywhere ExternalHostname or AutoDiscover URI's (from mail.company.com to legacy.company.com). Is that correct? Same for ActiveSync, or does that one need to be changed also (mail -> legacy)?
Reference:
https://blogs.technet.microsoft.com/exchange/2009/11/20/transitioning-client-access-to-exchange-server-2010/