Conflict messages in Sent Items - Outlook 2010

1 customer has reported an issue with conflict messages appearing in his Sent Items, randomly with email messages and calendar items. Occurs only when he is sending from his laptop connected locally. Does not happen when sending while connected through Citrix or via OWA.

We run Outlook 2010 on Exchange 2007. This user also has multiple devices: iPad, an Android and company-provided Blackberry. Does not occur when sending mail via mobile device. Does not have any additional add-ins; only the standard add-ins used by entire company. Also, we have our users on Cached Exchange Mode.

Has anyone experienced this with any users? Not a company-wide issue and as stated, happens randomly.
joshsarmymomAsked:
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Jamie McKillopConnect With a Mentor IT ManagerCommented:
Hello,

He could have a corrupt OST file. I recommend shutting down Outlook, delete the OST file, then restart Outlook and let the OST rebuild.

-JJ
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joshsarmymomAuthor Commented:
Thanks. Will try that.
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joshsarmymomAuthor Commented:
No further issues reported so not sure if this fixed his issue or not. Will assign points though because you responded.
thank you.
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