Hello,
I am a bit confused about info about requirements when migrating Exchange ActiveSync (EAS) from 2003 to 2010. Now this question is related to EAS only, forget about other services, such as OWA or Outlook Anywhere, for a while.
Basically, all migration guides state that you have to configure and setup a legacy url for legacy services for co-existence. Based on that, I have had an understanding that Exchange 2010 CAS cannot proxy EAS users that are still on Exchange 2003, but issues
a redirect command to EAS client.
However, this article shows information that, based on my understanding, states that Exchange 2010 CAS DOES proxy EAS clients that are still on 2003: http://blogs.technet.com/b/exchange/archive/2009/12/08/3408985.aspx
For migration from 2007 EAS to 2010 EAS the article shows redirecting, but not with 2003.
So my question is: While talking about only EAS, do I need to configure legacy external url/namespace/name resolution or not?
Thanks for answering!