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My business partner and I download company email from the same POP server, with Outlook 2010 set up to leave mail on the server for a month, so that we can each get a copy of everything.

I've started archiving some of it to a separate PST file, which seems to have the effect of fooling Outlook into thinking that the email left on the server is new - so it downloads it all again.

How can I prevent this?

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up vote 1 down vote accepted

I do not think you can.

You guys should consider switching to Hosted Exchange with Microsoft itself. It is $5 per month, it is more stable than POP3 (PST's SUCK, OST's not so bad), synchronizes very quickly (after the first big one), you can access the same e-mail from multiple computers and it is always the same, your saved folders and contacts and calendars are also there, and lastly I have clients with 12GB mailboxes, who still have excellent performance, even though they access a server in Washington state from Massachusetts. You probably would not need to archive as you are doing now.

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+1 for hosted service. Far less hassles. – surfasb Jul 10 '11 at 2:32
Thanks. Might well go for that in time. For now, I'll just archive the stuff thats older than a month! – ChrisA Jul 21 '11 at 21:31

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