I have one client running Outlook 2003 with Exchange 2003. He receives email fine but can't send. We get the error
"Task 'Microsoft Exchange Server - Sending' reported error (0x80040115) : 'The connection to the Microsoft Exchange Server is unavailable. Outlook must be online or connected to complete this action.'"
the computer is online and Outlook says it is connected. I created a new profile and I have the same problem. It also does not work when I open Outlook in safe mode.
I configured Outlook to use a proxy server and to use it for fast and slow connections. Sometimes this forces a username and password dialog box to come up. When that happens we can enter the information and it works for a short time.
I also installed Office SP3.
There are no errors in server or workstation event logs.
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