Using Outlook or Outlook Express to connect to the OWA??

I have cutoff branches access to use IMAP or Exchange to connect to their mailboxes and have forced them to use the OWA.. Too many security issues have arose from having PORT 25 open to relay from the branches to the Exchange box at corporate.  Is there a way for them to utilize the fat clients (Outlook or Outlook Express) to connect to the Exchange box through the OWA access?  I know Outlook Express can add: POP, IMAIL, WEB.. so I didn't know if you could configure the web or not.  Any ideas or suggestions on this would be greatly appreciated!

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if you are using exchange 2003 and outlook 2003 then you can implement RPC over HTTP
mschwadeAuthor Commented:
no, exchange 2000
A company called XKEY used to have OWA on a USB memory stick that provided OWA that could be used offline. It was discontinued last year sometime.
Otherwise you are stuck with the same options we had before Exchange 2003/Outlook 2003:



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