Outlook 2010 - Flag Message for Follow-Up - "The function cannot be performed because the message has been changed."

About 80% of the time when I click on a message and attempt to flag it for follow-up, I get the error message "The function cannot be performed because the message has been changed." I am running a 64bit version of Windows 7 Ultimate and 64 bit Office 2010 connected to Exchange server.

After reading some info here on EE I did delete my outlook profile and rebuild it, but that has not solved the issue.  

Here's the error message:
Error message
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gijames1982jlAsked:
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gijames1982jlConnect With a Mentor Author Commented:
Enabling cached exchange mode did the trick.
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e_aravindConnect With a Mentor Commented:
Any other delegate(s) accessing the same mailbox from older version of Outlook?

Is this happening only with the "Cached Exchange Mode"?
Can you try and see if the issue goes away with the "Outlook /safe"


>Got any communicator installed along with the 64 bit Outlook?
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gijames1982jlAuthor Commented:
There are no other delegates, will try with the Outlook /safe switch, not using cached mode and no communicators installed.
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e_aravindCommented:
You got any other mobile devices\applications connecting and sync. with the mailboxes?
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gijames1982jlAuthor Commented:
Yes, I have an Android, but the problem was present before I had that device.
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gijames1982jlAuthor Commented:
Doesn't go away with outlook /safe.
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gijames1982jlAuthor Commented:
Solution reached by following guide from other user.
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