Outlook 2007 not showing attachments correctly

Recently upgraded Exchange from 2003SP2 to 2010.SP0

Emails in public folders no longer show the correct multiple attachments; instead a single one of "unknown file type" ATT999x.

Yet they are visible in OWA with correct names. Though the PDF attachment cant be loaded in OWA (it was/is a link to a file, and only 64bytes long. cant be saved either.)

lnk is not blocked by outlook07 outlook msg owa format
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Robberbaron (robr)Asked:
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Robberbaron (robr)Connect With a Mentor Author Commented:
I've bitten the bullet and am in the process of updating each and every message in the public store the has the issue.
seems to be the only option as the Exchange 2003 CdoFileLink type just isnt supported anymore.

will close the question,
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Robberbaron (robr)Author Commented:
thanks i am aware of the security levels but have no idea why the 2 attachments are listed in OWA , but one is not shown correctly in Outlook07.  

I have many messages similar and most only show the att0xxxx file, not even listing the blocked attachment.
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Robberbaron (robr)Author Commented:
the blocked attachments are only 64bytes long and are/were mail item links to filesystem.  but cant be read by Exchange Webservices.
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bahigeCommented:
When I see those ATT files I automatically recall this being an issue with a linux mail server (qmail or sendmail) emailing the attachments to Exchange.  I can be wrong but I think that may be the issue.

This may be an issue with a mime header.  Are you using an SMTP proxy?

Check this link out:
http://answers.google.com/answers/threadview?id=373666
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Robberbaron (robr)Author Commented:
could well be a header issue.

these message were imported into EX10 fro EX03 and used to have attachments of cdoLink type. But seems not recognised by EX10 or OL07. Could also be AV impacted during the import/export but no solution yet.
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