OK. An externally connected Outlook 07 client can connect using
Outlook Anywhere; he can receive, send, and do just about everything,
except use the out of office function. I get an error that "Out of
Office settings cannot be displayed, because the server is
unavailable..."  I know this has to do with the autodiscover service.
Our web facing domain name is https://mail.mycompany.com and I have a
signed cert from Thawte for that name. But I don't have a signed cert
for https://autodiscover.mycompany.com.

When I put an entry into my host file that points autodiscover to the
public IP of the mail server, the OOF works fine. I do see this in the
log for that external OL07 client when I run the test email config:
"Autodiscover to https://mycompany.com/autodiscover/autodiscover.xml
FAILED (0x8000C8203)"

So the question is: Do I need another cert for autodiscover for all of
this to work? That's the answer I cannot find.
Thanks!
CB