I think it is in best practices to separate the CAS server from mailbox.
-----Original Message----- From: Jeremy Anderson [mailto:jan...@mapiadmin.net] Sent: Saturday, August 07, 2010 7:40 AM To: MS-Exchange Admin Issues Subject: Exchange 2010 and 2007 Co-Existance If I have Exch 10 and 2007, does the Exchange 2010 server have to have the CAS role separated from the mailbox role? I want my users to never notice the difference, just to have them go to mail.company.com/owa I have read the articles about creating a Legacy host record, and I am fine with that, but I cant find a difinative answer on if the CAS server needs to be seperate from the mail box server. I know that this was the case for 2007 to 2003. Also, does the answer to the question above change if its published behind ISA 2006? Thanks Jeremy This e-mail may contain information that is privileged or confidential. If you are not the intended recipient, please delete the e-mail and any attachments and notify us immediately.