I know this question was asked before and there was no solution to the problem and like to find out if someone might have an idea how to fix this problem, I am in mix mode 2007 and 2010 migrating users to 2010, when the users are setting up their new accounts on the exchange 2010 server the message comes up: The connection to Microsoft Exchange is unavailable. Outlook must be online or connected to complete this actions. If I click OK on that tab then I get another box General box with the Microsoft Exchange server filled in with one of my 3 exchange server names and not my cas server name, if I back out the exchange server name and put my cas server name in then it autodiscovers and adds the mailbox to the workstation, but I do not want my users having to put the cas server name in to connect. What am I missing that is pointing the autodiscover to my exchange server and not my cas....when I run the command Get-MailboxDatabase CASSERVERNAME |fl rpcclientaccessserver it comes back with my FQDN for my cas server...so it see's my cas right but why is it not populating it in my autodiscover when I add a user, also it works fine if I add a 2007 users mailbox it finds it.
Any help would be appreciated it.