Outlook 2007 disconnecting after sending email to specific email

Posted by Michael on Server Fault See other posts from Server Fault or by Michael
Published on 2013-10-20T21:52:32Z Indexed on 2013/10/20 21:56 UTC
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exchange-2010

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outlook-2007

So when a user emails another tech in my domain they get the prompt for username/password as though they got disconnected.

I have not seen any issues in the event logs, tried deleting the email address from his auto correct, ran Outlook in safe mode and searched online as well. I am kind of lost. Checked the event logs on the exchange server as well in the security and still nothing.

Exchange 2010, Client OS: Vista x64, Outlook 2007.

Thanks!

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