Two days ago after setting up a mobile phone to act as a modem for my
laptop, testing it, and disabling the dial-up connection associated
with it, and reconnecting to my domain and usual network (non-GPRS) I
find that I can no longer connect to my Exchange Server.

The "Working Offline" icon shows up in the lower-right hand corner of
the Outlook Client window, and when I uncheck "Work Offline", I get
prompted for a username and password. Normally, I should just be able
to cancel out of this window and Outlook works fine again.

However, since two days ago, it does not. The window comes right back,
and many times again.

I have since restarted my computer, shut down and restarted, restarted
Outlook, and still this occurs.

System info:

Outlook 2003
Exchange Server 2003
Using Cached Exchange mode, and Kerberos/NTLM connections
Roaming Profiles


Any assistance, greatly appreciated.