delete duplicates in outlook 2010 calendar

The old calendar is not updated(only if existing meetings receive updates) and other users and 3rd party devices, see only the 'new' calendar. The items in the calendar(and the other folders) simply start from day1 and goes forward. These changes are replicated to Exchange, so we cannot fix this by New profile, reinstall Office/PC, nor will any switches help. We thought at first this might occur when users had accepted their first meeting request. It seems that this happens when they start Outlook first time, since Tasks, Contacts, Jounal and Notes are also duplicated. There is no similarities in programs(itunes, pcsuite etc.), 3rd party devices(BB, HTC, Nokia, SonyE) and no regional settings as well. I am the one troubleshooting this issue for X-Ray Cat. Please remember to mark the replies as answers if they help and unmark them if they provide no help. If anything is unclear or if there is anything I can do for Please take your time to try the suggestions and let me know the results at your earliest convenience. If the calendar from Exchange Server, you can logon mailbox via OWA, if there has duplicated calendar, the problem might be caused by Exchange Server.

“Outlook: Troubleshooting guide for missing, duplicated or unsynchronized calendar items” If the problem still did not resolve, you can refer to this KB article: Turn on or off Cached Exchange Mode, ClickĢ. PST file follow these methods troubleshootġ. Microsoft Office for IT Professionals Forums.

Delete duplicates in outlook 2010 calendar