A client of mine is having a strange issue where his Gmail sent items duplicate in his Sent Items in Outlook 2010. His Gmail is set up via IMAP and weirdly enough it doesn't affect all his sent items but roughly every third one.
I've ruled out a local issue as it does this on two laptops with Outlook 2010 even after a clean re-install.
I've trawled Google and attempted all the fixes like specifying Gmail not to save sent items in OUtlook as per: http://www.msoutlook.info/question/526
but it still persists.
Has anyone seen this before and been able to resolve? Thanks.