Outlook rpc over http issue

[Nicola Musa]

This is the 2nd time I post this and no reply ?? We have outlook that is
functioning in RPC over HTTP everywhere however; in one of our sites when hte
outlook client connects to the Exchange through the LAN it displays " waiting
to update this folder" for more than 30 minutes. The mailbox store is at the
same site and the OAB V 4.0 has a replica there. this probloem occurs only
when outlook is fuinctioning in cached mode and when you press CTRL and right
click on the tray and click on connection status. It shows that it's "
connecting " with the public folders and it travels from one server to the
other without getting anywhere.

I tried to assign Public Folders Referral to a certrain server and it still
tries to conenct then nothing happens. The crazy thing is that it tries to
update the OAB and it can't although there's a copy of the OAB in the local
server.

The backend server contains a copy of the OAB, OABV4 and Free Buzy and it is
on the same subnet of the front end server. the clients can access the front
end server with HTTP and HTTPS. I still can't figure why the outlook clients
querries other servers. what could be the problem ?