Scope of work: Transitioning a client from an Exchange 2007 to Exchange 2010. The Exchange environment consist of 2 Exchange 2007 SP2 servers as stated below and will be in a coexistence period. The Exchange servers will all reside in the same AD Site.
CAS and HUB TRANSPORT
MAILBOX ROLE ONLY
I have spent several hours reading through all known MS KB articles and forums explaining how to place 2 2010 servers into coexistence, order the roles must be installed, legacy URL, etc The specific task I am most concerned with in the installation of the 2010 CAS and Hub Transport roles. From what i am reading most phones are not capable of CAS redirection and this client has over 130 EAS devices. So this has lead me to want to install the new 2010 CAS/HT using another External URL such as webmail.clientdomain.com instead of their existing mail.clientdomain.com.
What are everyone's thoughts about taking this route? How will autodiscover work internally and externally since i can only point the DNS records to 1 CAS server? What about all the Service Connection Point URLs, i assume each of them will point to their respective server. Does anyone have any real world experience with this that can point me in the right direction. All help is greatly appreciated.