I upgraded to Mavericks several months ago and just now Outlook is downloading all of my old messages over and over again. (I just installed the latest update to Office so that's not the issue.)

I read the MS post that this isn't an Outlook issue (http://answers.microsoft.com/en-us/mac/forum/macoffice2011-macoutlook/outlook-my-outlook-keeps-on-receiving-old-messages/0555b601-5be3-4ec2-8d33-14cfc9fac1c8), but it REALLY IS since this NEVER EVER happened in the prior 10 years or so I've been using Outlook but is now an on-going issue.

I also have a PC and with OFFICE and lo and behold IT REFUSES TO DOWNLOAD ANY OF MY E-MAILS!!!!

I don't know what happened but is sounds idiotic that this has NEVER HAPPENED previously, but now all of a sudden is a constant pain in the A!