We are currently using Exchange 2007(Windows Server 2003 x64)/Outlook 2007(Vista Ultimate, Vista Home Premium).
When trying to access the users email using a 3G card, Outlook will try to connect to the Exchange server but never does. The status always shows disconnected.
As soon as I connect through LAN, I can access the email account with no problems. The issue arises when I go offsite.
I've tried this fix to no avail:
After multiple attempts I still cannot connect to Exchange. I'm making the assumption that this has always worked as it just recently stopped working.