NOTE: This article has been updated to correct the MSAS URLs mentioned in this article.
By now most of you have heard about the release of Exchange 2010. Those of you that are upgrading from Ex...
Published Nov 20, 2009
Version 1.0
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Nice article and helped me to understand how I should configure everything for the coexistence but I still have a thing that I don't understand...
I am planning an upgrade of our Exchange 2003 environment to 2010. I have 5 Exchange 2003 mailbox servers spanned across 5 locations and 1 front end OWA server with 1000 users.
As I will not be able to migrate them all at once I will need 2003 exchange coexistence.
What I want to do is to replace the old 2003 front end with a new 2010 CAS server.
Let's say my 2003 frontend is called : webmail.contoso.com
What I want to do is to remove exchange from it , install a new machine with CAS 2010 and call it webmail.contoso.com and give it the same IP as the old one as I don't want to use 2 different names for the OWA being to much hassle to reconfigure 500 mobile
devices.
According to the Msexchangeteam blog
http://msexchangeteam.com/archive/2009/11/20/453272.aspx , I will have to buy a new wildcard certificate with the names :
webmail.contoso.com
autodiscover.contoso.com
legacy.contoso.com
and set up the specific URL's for my 2010 and 2003 owa.
Now , according to the article , OWA will work just fine but how will the moail enabled mobile devices act to this ?
I have about 500 users using Nokia mail for exchange and MS ActiveSync with the mail server specified as : webmail.contoso.com
Will I have a problem here or will the new CAS server redirect the requests to the correct mailbox server ?
Can I use the path I want to keep the old name webmail.contoso.com and just configure the web access like :
Set-OWAVirtualDirectory OWA* -ExternalURL https://webmail.contoso.com/OWA
https://webmail.contoso.com/OWA -Exchange2003URL https://webmail.contoso.com/exchange
https://webmail.contoso.com/exchange
Thank you in advance.