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Try this on one of the PCs<br />
<br />
Close Outlook and open via command line (Start, Run)<br />
<br />
&nbsp; outlook /cleanreminders<br />
<br />
Exit Outlook and open again via command line<br />
<br />
&nbsp; outlook /resetfolders
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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

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Thanks I just tried that, now checking if dups appear again.
</div>


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

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<div class="content wysiwyg-content">
Dear Experts,<br />
&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; 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.<br />
<br />
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.<br />
<br />
Any suggestions please ?
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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 ?

Exchange mailbox duplicating calendar items

Microsoft applications include a variety of software programs, including development and digital authoring programs (Expression and Media Center), educational programs, Internet software, including Essentials, Skype and the Live family, anti-virus, productivity applications and suites like Office, Excel, Word, Outlook, Access and PowerPoint, video games and server applications such as Exchange, SharePoint, IIS and Virtual Server.

Microsoft Applications

Microsoft Outlook is a personal information manager from Microsoft, available as a part of the Microsoft Office suite. Although often used mainly as an email application, it also includes a calendar, task manager, contact manager, note-taker, journal, and web browser.

Outlook

Exchange is the server side of a collaborative application product that is part of the Microsoft Server infrastructure. Exchange's major features include email, calendaring, contacts and tasks, support for mobile and web-based access to information, and support for data storage.