Pst file and exchange

[LJA]

I have a laptop using both exchange server and pop3 mail
The profile is set up to deliver all mail to the local pst file on the laptop.
The messages sent from and to users in the internal global address book work
fine,
and the pop3 account sends ok, but does not receive. If I set up the pop3
account on a workstation that uses the exchange mailbox rather than a pst
file, everything works fine... Does anyone know why this setup should not
work?? Am I missing something?

Thanks

Lee