Yes we are using an exchange server
And now that you mention that it is an X.500 address. (DOH!) I remember
seeing it before but the the person who fixed it is no longer here. Any
advice or suggestions?

"Brian Tillman [MVP - Outlook]" wrote:

"
wrote in message ...

But not all the time. When it is showing as a unc path, the email address
is
rejected.

Are you using Exchange? Are you sure it's a UNC and not an X.500 address?
--
Brian Tillman [MVP-Outlook]