How can I clear the cache of messages?

13. December 2012 · Write a comment · Categories: Outlook for Mac · Tags: , , , , , ,
How can I clear the cache of messages ready for uploaded that failed upload due to size (I can only upload 20mb) but outlook keeps trying to upload it? The error I get is DATA size exceeds maximum permitted. Oulook continues to try and upload the data every 10 minutes for about nine times then quits. HELP please.

I am running OS X 6.8.2

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