Thanks. I did take a look at the admin templates in Group Policy for Outlook
previously, but couldn't find the specific function. Actually, the only
configurable option is "Polling OOF Web service".

"F.H. Muffman" wrote:

Is it possible to disable the "Anyone outside my organization" option
through group policy, a registry change, or something else?

Possibly. I'm locked down in a domain I don't control at the moment, but
I'd look at http://www.howto-outlook.com/howto/policies.htm to see if there
is a policy that will help.


--
f.h.
Microsoft Outlook MVP