How do I accept a meeting request in Outlook 2007?

I have multiple users that are getting the message "You are the meeting organizer you don't need to respond to the meeting." It happens with multiple meeting requests. We are in an Exchange 2003 environment. Users are running Outlook 2007.
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We have a known issue with the "Exchange 2007 mailboxes"

Current issues with Microsoft Exchange ActiveSync and Third Party Devices
Issue 1.2 - Attendee becomes meeting organizer

So, the same might have some share of impact with the "Exchange 2003" too?
> Do you see this issue with the mailbox users with the mobile devices or without mobile devices too?
> Any pattern of particular mobile device version is causing this issue?

SmiddletAuthor Commented:
We are still on Exchange 2003 and will be moving to 2010 in the next month or so. I've only seen this issue with users with mobile devices. The device that I know about is a Droid.
The options are:
1. we can ask the end-users to avoid mobile devices for a while
2. Change the model\make\build-number\versions of the mobile device which he is currently using

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