Still celebrating National IT Professionals Day with 3 months of free Premium Membership. Use Code ITDAY17

x
?
Solved

Exchange 2003 to 2010 upgrade networking question

Posted on 2011-03-04
7
Medium Priority
?
266 Views
Last Modified: 2012-05-11
As I understand it, the CAS handles all new traffic for web access during install (OWA, ActiveSync, Outlook Anywhere, etc.).  That being said, I have a network that essentially has a VIP that load balances 2 Exchange 2003 OWA servers that then enter our SPAM filter then onto the Exchange 2003 MBXs.

So if I change the VIP to redirect to the new CAS after install, the old 2003 environment is still active since no mailboxes have been moved, correct?  Essentially the CAS takes the traffic from the VIP, and if the mailbox exists on the 03 servers, it does a URL redirect to "legacy.example.com", right? We have a very large environment and I really need to understand exactly how the routing works before we attempt approval.  I need to be the subject matter expert in a matter of a few weeks.

I hope I explained how it works currently.  I appreciate the assist in advance.

-Carlton
0
Comment
Question by:liquid101
[X]
Welcome to Experts Exchange

Add your voice to the tech community where 5M+ people just like you are talking about what matters.

  • Help others & share knowledge
  • Earn cash & points
  • Learn & ask questions
  • 4
  • 3
7 Comments
 
LVL 8

Expert Comment

by:praveenkumare_sp
ID: 35041370
u need to do the following(lets assume your current OWA(2003) URL is "mail.example.com")
1) Create a new Public DNS entry like "legacy.example.com" and make it point to where "mail.example.com" is pointing to.

2)Now point "mail.example.com" to your 2010 CAS server

3)Run a command Set-OWAVirtualDirectory -Identity "CAS2010\Owa(Default WEB Site)"  -Exchage2003URL "legacy.example.com"

4) Go have a nap or chill out as your work is done

Note:-IF you point  your VIP to point to CAS(or CAS array) , how will you load balance the Exchange 2003 ? so dont do any of those just follow the above steps
0
 
LVL 1

Author Comment

by:liquid101
ID: 35043280
So what about the CAS array?  We do want to Load Balance those as well.  Which is another question.  We don't want to use Windows Load Balancer to create the array.  Does the CAS array tool allow for that or do we just need to Load Balance 2 or more CAS boxes and not worry about the array settings?
0
 
LVL 8

Accepted Solution

by:
praveenkumare_sp earned 1000 total points
ID: 35044793
use a hardware load balancer for your cas array(remember to Select a Load balancer that can load balance RPC requests)

Point the "mail.example.com" URL to hit your 2010 cas array (VIP of your cas array)


Found a awesome Website which describes the step by step approach to Create a cas array
http://www.exchange-genie.com/2009/09/momt-mapi-on-the-middle-teir/

0
Simplifying Server Workload Migrations

This use case outlines the migration challenges that organizations face and how the Acronis AnyData Engine supports physical-to-physical (P2P), physical-to-virtual (P2V), virtual to physical (V2P), and cross-virtual (V2V) migration scenarios to address these challenges.

 
LVL 1

Author Comment

by:liquid101
ID: 35056326
My concern is the routing, which I understand a bit better thanks to the link above (THANKS!).  In the current environment, the two OWA boxes are outside of the firewall, which then access the mailboxes inside the firewall.  With the CAS array being behind the firewall, will the URL redirect to the legacy 2003 boxes during the coexistence cause an issue?
0
 
LVL 8

Expert Comment

by:praveenkumare_sp
ID: 35061460
No the redirect will work just fine ;P

but understand putting the CAS before the Firewall is not a very good option, do reconsider this architecture
0
 
LVL 1

Author Comment

by:liquid101
ID: 35061535
When I say behind the firewall, the CAS will be well within the confines of protected space along with the Mailbox servers.  In the older environment, however, the OWA boxes were in the DMZ as front-end servers used for authentication.
0
 
LVL 8

Expert Comment

by:praveenkumare_sp
ID: 35061648
I know but still

what i meant is the below
CAS->Firewall->MBX is not correct

meaning there must be no F/W between Cas and Mbx
0

Featured Post

Veeam Disaster Recovery in Microsoft Azure

Veeam PN for Microsoft Azure is a FREE solution designed to simplify and automate the setup of a DR site in Microsoft Azure using lightweight software-defined networking. It reduces the complexity of VPN deployments and is designed for businesses of ALL sizes.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

This article explains how to install and use the NTBackup utility that comes with Windows Server.
After seeing many questions for JRNL_WRAP_ERROR for replication failure, I thought it would be useful to write this article.
This tutorial will walk an individual through locating and launching the BEUtility application to properly change the service account username and\or password in situation where it may be necessary or where the password has been inadvertently change…
This tutorial will show how to configure a new Backup Exec 2012 server and move an existing database to that server with the use of the BEUtility. Install Backup Exec 2012 on the new server and apply all of the latest hotfixes and service packs. The…

704 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question