Can Receive Emails on Blackberry w/Exchange 2007

We've recently installed Exchange 2007 and moved all our mailboxes over from 2003 except for a few.
The exceptions are the users who have Blackberries. We do not run the blackberry server, we maintain ours thru their website since we only have a few.
Inside the web site we currently have the http://mail.abc.com/exchange and tried changing it to the new exchange box by http://mail.abc.com/owa but receive and error the mailbox can not be reached.
How do you configure either the blackberries or the exchange box without purchasing the server software?
DFCRJAsked:
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DFCRJAuthor Commented:
that will do it everytime.
BlackBerry Internet Service 2.x supports up to Microsoft Outlook Web Access 2007.
thanks!
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