Old Attachments missing from Outlook 2003 / Exchange 2007

We have an SBS 2008 system running Exchange 2007. Users are complaining their older emails with attachments (more than a year old) are missing the attachment from their Outlook. The email shows the paperclip in list view that there is an attachment, but when previewing the email, the paperclip is gone and there are no attachments. They do not show up in OWA either.

More recent attachments are fine. I can't find a policy anywhere that would cause this.

Any ideas? Thanks!
ejctechnologiesAsked:
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Raymond PengConnect With a Mentor Systems EngineerCommented:
Do you implement any kind of 3rd party archiving solution?  Something like EAS where it archives email and presents only stubs instead?

Check for any addins that are running in Outlook.  Try disabling them and see if they return.
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ejctechnologiesAuthor Commented:
We don't have any archiving or 3rd-party anything plugged into exchange.

I turned off any plugins and ran outlook safe mode but to no avail.

Thanks. Any other ideas?
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ejctechnologiesAuthor Commented:
Turns out cached exchange mode got turned off for every user at this office. I just turned it back on on the one machine I have remote access to and it seemed to fix the problem. I will verify tomorrow when I get back into their office.

Thanks for the rec and I will update this tomorrow.
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ejctechnologiesConnect With a Mentor Author Commented:
Verified. It was cached exchange mode.
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ejctechnologiesAuthor Commented:
When the poster mentioned stubs, it got me thinking about other reasons the full email content wouldn't make it to the outlook client.
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