Outlook 2007 Error - changes to the item were lost due to a reconnect with the server

A client is running Office 2007 SP2 on Vista Pro x64.

He has an Exchange and a POP account. Cached exchange mode is disabled due to the large mailbox size.

After approximately 30 minutes of use, Outlook no longer allows him to forward messages with attachments. When these messages are opened, the attachments cannot be opened, but they can be viewed (in the case of images like PNG and JPEG files) if he manually right-clicks on an attachment in Outlook and clicks on "Preview". If he attempts to forward/reply the message, or open an attachment by double-clicking, he receives the following error message:

"Changes to the item were lost due to a reconnect with the server".

The only temporary solution is to close the Outlook client and reboot the machine.
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There is a connection issue at the server end. One thing I have learned very recently is that Outlook will not act right and will not allow your computer to act right if your server is cutting you off in the middle of your connection?

Is your clients email being run by another company? If so see if there on a shared hosting account. My mortgage company just had this problem. All 600+ users get booted by the email server. We were on a shared hosting account with an ESP
dogbertiusAuthor Commented:
I don't think that's the case. The is a SOHO setup with a local Exchange 2007 server for less than a dozen PCs.
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dogbertiusAuthor Commented:
180 days. I considered this too, but since I recently had to reboot the router, I didn't think this would be a concern.
how is your outlook connecting to the mail server through the local network or are you sending out through the public domain and back in?
dogbertiusAuthor Commented:
Through the LAN. Looks like a random bug. Cleaning out the secure outlook temp file cache seems to help. I thought it was supposed to empty itself periodically though.

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