Connection to Microsoft Exchange is unvailable. Outlook must be online or connected to complete this action
Posted on 2008-10-01
I would like to request help on a matter that has been bothering me all morning. Despite quiet some research and work i am unable to find the problem and way to solve this.
We have Outlook 2007, and server 2007 on every computer in the network, and all works fine. But lately, i've noticed that some computers that we've been preparing for new comers can't connect to the exchange server. There is no particular reason as the settings and everyting are set by a default image and are the same everywhere.
The message that I receive when I open outlook is the following : The connection to Microsoft Exchange is unavailable. Outlook must be online or connected to complete this action.
I have tried litteraly everything i can think of, the network cable is plugged in, i've set and reset the IP, checked the configuration of the gateway, DNS ad DHCP server. I've flushed the DNS, i've removed the MCAFEE antivirus, i've turned off the windows firewall and also set the ''exceptions'' and ''advanced'' tab of the firewall settings all to off.
At some point i got it working, for no particular reason, i thought that changing the firewall settings did it, so i was happy, i reinstalled the antivirus, and removed the mailbox and restarted the whole process, but again, same problem, so i either did get it working simply by luck or really did something that solved it, but what i don't know because I have been repeating the same process for the past hour and now it's not working, i think it was just a ''one time luck.
I've tried also removing the profile, re adding, removing the PST files, repairing them or manualy adding the mail server address, checking the address of the server, pinging... everything i can possibly think of, reinstalling and uninstalling the virus + rebooting several times, at each step.
I've read microsoft's article on the subject, most do not apply or help, also read other forums... and they are not helping or applying to my problem.
any advice would be strongly appreciated