Online archive e-mail missing

Hi, I have encounter problem with a users online archiving email missing from Exchange 2010 Sp1
We have received over 10 complained all their online archive mail are missing the only archived e-mail they can see is after April 2013
A particular user been with the company for over 10 years all his e-mail before April 2013 are gone
Another users report they received this error message in OWA trying to read a mail from online archive "  The item you tried to access no longer exists . The item wasn't found. You or a delegate might have moved or deleted it using another computer
or a mobile phone. "
If this happening to 1 or 2 users I would say they have accidently deleted their mail , we have received more then 10 complain so far  
I am starting to worry we might have misconfigure something in Exchange
Few months ago we have moved some users mailbox to another database to balance the load. At the same time we clean up some whitespace. 
We do have a Default Archive and Retention Policy included all users mailbox with in this policies . We have a policy that move users data from their inbox to online Archive after 13 months
Can anyone help me?  I've ran out of ideas at this point.
Thanks

Hi,
Probably you can restore the archived archive mailbox by referring to the following thread if you have backups:
http://social.technet.microsoft.com/Forums/exchange/en-US/c5665b2e-7f6c-4d0b-9caf-91ebf72b3c94/restore-mailbox-database-archive?forum=exchange2010
Thanks,
Simon Wu
TechNet Community Support

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    Hi!
    Outlook 2013 professional plus was working perfectly weeks ago, then out of nowhere new profiles doesn't have visible in Outlook the online archive and the shared mailboxes, however it shows up in OWA.
    It was given full permission for those users with no results, online archive is enabled, profiles were already deleted and recriated.
    The older profiles work perfectly.
    We have the services ActiveSync, Autodiscover, Outlook Anywhere, OWA and they're all working with no errors.
    Regards 
    Tiago Barradas

    Hi Tiago,
    From your description, OWA works work, so your Exchange server is ok.
    I recommend you check the following thing for troubleshooting:
    Please configure a mail profile with another user who has an Online Archive on that machine and check the result. If it works well, there is something with the problematic mailbox. If the issue persists, the issue is related to your Outlook.
    Hope it helps.
    Best regards,
    Amy
    Amy Wang
    TechNet Community Support

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