We just started implementing Exchange 2007 SP1 into a current Exchange 2003
org. Everything is going as planned including SCR except for one aspect...

Our org is as follows:

3 sites
each site has Mailbox, Client Access, Hub Transport roles

Our original plan was to have 1 web mail URL thats published on the internet
(mail.domain.com) and use DNS round robin to distribute the load, and
if/when a server is down we will remove that record from DNS. We'd like to
use forms based authentication for a better experience for the end user.

It doesnt look like this plan will work as it just wants to redirect the
user to the proper CAS/mailbox server with a nice little message. If I drop
the round robin portion of the plan and use 1 internet published CAS to
proxy to the other CASes it works. This doesn't offer the redundancy I had
hoped to build into the OWA org.

Am I right in saying my plan to use round robin to serve up OWA from
different geographical sites isn't going to work unless I add split the CAS
and Mailbox roles between 2 servers in each site?

If so I'll just have to drop the round robin idea as we don't have a budget
to purchase 3 additional servers for our network.

Thanks!

Scott

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