Outlook 2010 calendar invites - duplicate recipients

Have a client with Outlook 2010, she’s finding many of the Outlook invitations on her calendar have multiple copies of the same recipients.
This user's calendar is opened on multiple computers - running Outlook 2003, 2007, 2010.
I’m trying to reproduce this issue reliably, but not having luck yet. Tried creating an invitation, moving the time, but couldn’t get issue to occur.
Has anyone run into this?

Hello,
What Anjula meant to say was there are no updates that corrects the issue you are having nor are there any "Solution in the works". From Time to time we have made changes to Calendar work flow that enhances calendar performance. So its advisable that we have
clients at the latest Service packs and updates available. I don't think there will be any new changes to the work flow in the near future. Its best advised that you have the latest updates installed for Office. You can install the updates from here.
953878 Cumulative updates are available from the Microsoft Office team to fix reported problems
http://support.microsoft.com/default.aspx?scid=kb;EN-US;953878
To troubleshoot this issue. We can do the following
> For manager Delegate scenarios its best advised to have a similar version of Outlook client.
> we can review permissions assigned on the calendar. Change that or remove delegates to see if there is any impact.
> Disable mobile device usage etc to narrow down the issue.
There are some Self help articles that can help you out:
Outlook meeting requests: Essential do’s and don’ts
http://office.microsoft.com/en-us/outlook-help/outlook-meeting-requests-essential-dos-and-donts-HA001127678.aspx
How to troubleshoot missing and duplicate appointments in Outlook
http://support.microsoft.com/default.aspx?scid=KB;EN-US;890436
  If this fails to correct the issue I would suggest that you open a Support Incident with us. As this issue requires in-depth support so its best that you open a support ticket with us.  Please visit the following link to see the various support
options that are available to you:  http://support.microsoft.com/default.aspx?id=fh;en-us;offerprophone . This will help us address your issue more efficiently.
I would encourage you to do reply back here in forum once you have received a solution to the problem.
  When you do open a support incident with us we will be applying the following troubleshooting steps as listed in the article.
Working with support to troubleshoot the Outlook calendar in an Exchange environment
http://technet.microsoft.com/en-us/library/cc891495.aspx
Hope this helps,
Best Regards,
Nitish Karmakar [MSFT]

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