I have a small business 2003 server running Exchange. However, Exchange uses the POP3 connector to retrieve emails.
All users in the office don't have a problem with duplicate emails.
Remote users who have Laptops have their Outlook configured so that they have an Exchange mailbox which is the default store. This uses .ost file to keep the Exchange server up to date when the user either comes into the office or connects using a VPN to synchronise. However, in order for the user to get their emails whilst not connected to the Server they have an additional email account setup which uses POP3 to collect their emails. These are downloaded onto the laptop and into the .ost file (not a separate .pst file).
When the remote person does synchronise they receive duplicate emails. Any odea why?