When you click the Dial-Up Connections tab in the properties for the
Internet Mail Service or Internet Mail Connector, the following error
message may be displayed:
The Remote Access Service (RAS) phone book cannot be opened. It must be
accessible and in the system directory as \winnt\system32\ras\
rasphone.pbk.
In addition, the following event may appear in the event log:
Event: 4106
Source: MSExchangeIMC
Category: SMTP Interface Event
Description: The dial-up connection "<phonebook>" could not be made.
The error reported was [5]. Access denied.
Where <phonebook> is a Dial-Up Networking phonebook entry. Note that if you
attempt to manually establish a connection using the Dial-Up Networking
phonebook entry, you are able to do so.