I've just installed the Outlook 2007 on my Windows XP Home (SP2). I tried to add my Microsoft Exchange mail account to it but after numerous attempt, Outlook failed to connect to the server. When I try to load Outlook after restart, it took a long time to load and in the end there was no response. I tried to do Cancel Server Request and was prompted by this error message. "The connection to Microsoft Exchange is unavailable. Outlook must be online or connected to complete this action. " After closing the prompt, there is this window for me to enter my MS Exchange server and User Name. If I click ok, Outlook will fail to connect to the server again. If I click Cancel, I'll be prompted with this message: "Cannot open your default e-mail folders. The file C:\Documents and Settings\User\Local Settings\Application Data\Outlook\outlook.ost is not an offline folder file. " Then Outlook will be unloaded. Until now there is no way of me getting into Outlook. Even if I want to cancel my mail account connection, I can't do so and it's really frustrating. Hope someone here can provide me with some advice. Thank you.