Can't find .OST file

[John]

I get the following message but when I search the
harddrive for *.ost files there are none. I know the
file is there because I can open Outlook off-line. I
check the harddrive and double checked in the defualt
location.

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Unable to start processing services. The Exchange
Server has detected that you are using an old copy of
your OST
file. Please delete your OST file and create a new
one from the server.