Outlook 2010 cannot access data file


In our office we have sbs 2011 and exchange 2010. One of the mailboxes is shared between 3 computers. Only one of the computers has issues and receives error that Outlook 2010 cannot access data file. After reopening the Outlook, there is no more errors for at least a couple of hours.

Could you please advise ?

Thank you,
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Check the event id 9646 on Exchange..might connection issues.
A data file is sometimes used on the PC, either in Cached or even non Cached mode.
Also check if he's using another PST file. Close this PST file for now to test (for example, archive.pst)
If already NO open PST file, try to recreate the Outlook profile, preferably in non Cached mode.
Check the PC for hard disk errors too.

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