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Exchange mailbox duplicating calendar items

Last Modified: 2013-02-22
Dear Experts,
            I am having an issue with a user's mailbox on exchange server 2010. The user has the mailbox synced to 3 systems, 2 macs and one PC then as for mobile devices the user has 2 iphones, 1 ipad and one Samsung note (Android device) the issue is that random entries in the calendar (especially recurring ones) are being duplicated multiple times sometimes the same entry is present 6 times in a row.

So far I have reset delegation on the mailbox as I thought that could be the issue but to no avail as the problem persisted.

Any suggestions please ?
Watch Question

Try this on one of the PCs

Close Outlook and open via command line (Start, Run)

  outlook /cleanreminders

Exit Outlook and open again via command line

  outlook /resetfolders


Thanks I just tried that, now checking if dups appear again.
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