We are in the process of transitioning our existing Exchange 2007 email system to Exchange 2010.
- Currently in our Exchange 2007 infrastructure we have 2 HUB-CAS 2007 Servers (both roles co-located) running in Windows NLB
- Our External Namespace: mail.domain.com
- NLB Cluster FQDN: mail.domain.com
- We recently introduced 2 HUB-CAS 2010 Servers (both roles co-located) and the plan is also to set these servers up with Windows NLB. NOTE: During setup, we provided our existing external namespace (mail.domain.com) so the Exch 2010 external URLs are already populated with mail.domain.com
- We will also setup a new CAS Array with the 2 HUB-CAS 2010 Servers
- We will be using Slit DNS in order to use the same namespace (mail.domain.com) on both Internal and External URLs for OWA, ActiveSync, etc
- We will leverage a new namespace (legacy.domain.com) in order to support the co-existence between Exch 2007 and Exch 2010 while we move mailboxes and services from 2007 to 2010 as indicated here: http://blogs.technet.com/b/exchange/archive/2009/11/20/3408856.aspx
Our Goal: to use the same external namespace (mail.domain.com) for the Exchange 2010 Organization which is the namespace currently used by the existing Exchange 2007
I’m trying to figure out how to deal with the CAS 2007 NLB and the new CAS 2010 NLB during and after the co-existence period.
If I setup a new NLB with the 2 HUB-CAS 2010 Servers (since the Exch 2007 NLB needs to be kept during co-existence), I will have to come up with a new NLB FQDN, new NLB Cluster VIP and obviously new DNS entry for the new NLB FQDN. For example, the new NLB FQDN would be something like: webmail.domain.com
Questions:
- What would be the best way to deal with these 2 NLBs (Exch 2007 CAS NLB and Exch 2010 CAS NLB) so I can use the namespace (mail.domain.com) for Exchange 2010; which is the namespace currently being used with the existing Exchange 2007?
After performing the switchover from Exch 2007 to Exch 2010, can I replace the NLB FQDNs as follows:
a. Change the Exchange 2007 NLB FQDN from mail.domain.com to legacy.domain.com
b. Change the Exchange 2010 NLB FQDN from webmail.domain.com to mail.domain.com
Is this supported?
2. If the above scenario is not supported, how can I deal with this so we keep the namespace mail.domain.com for our new Exch 2010 Org?
Please advice
Thanks in advance!
FT
