Today I had a user tell me that when he rebooted his computer (Vista Business SP2 x32), he could no longer connect to our Exchange 2003 server with Outlook 2007. It prompted him with the “Retry | Work Offline | Cancel” dialog. Clicking “Retry” did nothing, clicking “Work Offline” threw an error:
“The connection to the Microsoft Exchange Server is unavailable. Outlook must be online or connected to complete this action.”
The user could not connect to Exchange via Outlook 2007, nor via IE8. Firefox worked just fine after adding the https exception for our server’s self-signed certificate. So the problem wasn’t Outlook, nor was it a problem with the server. It had to be a problem with the network connection – but up to 7 system restarts still hadn’t fixed the issue. There were no proxies, IE8 was reset to manufacturer’s defaults, and the server’s domain name was put into the Trusted Sites list on IE. Read the rest of this entry »