I am having the same issue...there seems to be a problem and RPC over HTTP is
not working either. It did not happen with office 2003 and the "loss" of
connection only happens at home through Comcast. When I change NO settings,
and go to a free wifi spot I can connect no problem. OWA is accessible
always, but I would rather use Outlook. Do they have a fix for 2007 yet that
I may be missing? I found a workaround he
http://support.microsoft.com/kb/913843/en-us
but I do not have the RPC key in the registry...very frustrating.

"Milly Staples [MVP - Outlook]" wrote:

Ask Comcast or your Exchange mail host - no one here can help you with your personal configuration issues.

--
Milly Staples [MVP - Outlook]

Post all replies to the group to keep the discussion intact. All
unsolicited mail sent to my personal account will be deleted without
reading.

After furious head scratching, Hays Young asked:

| I just upgraded to Outlook 2007, and suddenly I am no longer able to
| connect to my exchange server that is hosted by 4smartphone through
| my Comcast internet. However, if I change the same computer over to
| my AT&T DSL internet it works just fine. What can I go to comcast
| with to ask them to change on their servers??