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54
Authentication
method
Type of
authenticating
server
Description
Digest
authentication
Back-end server
for Exchange
2000 and
Exchange 2003
Client Access
server for
Exchange 2007
Digest authentication transmits passwords in hashed
form, which offers limited security. Digest
authentication can be used with or without Secure
Sockets Layer (SSL).
Integrated
Windows
(Kerberos and
NTLM)
authentication
Back-end server
for Exchange
2000 and
Exchange 2003
Client Access
server for
Exchange 2007
Integrated Windows authentication (formerly known as
NTLM authentication) is the strongest authentication
method that is supported by Entourage and Microsoft
Exchange. It incorporates its own encryption methods
and therefore does not require SSL.
Note In Microsoft Exchange Server 2007, Client
Access server supports Integrated Windows
authentication and HTTP 1.1 Digest authentication
for Exchange 2007 virtual directories. A Client
Access server that is redirecting to a back-end server
that is running Exchange 2000 or Exchange 2003
supports only Basic authentication and forms-based
authentication.
Client certificate-
based
authentication
Front-end server Client certificate-based authentication is available with
Entourage 2008 for Mac Service Pack 1 (SP1). This
authentication is a type of two-factor authentication
that uses two separate items, a client certificate and a
password, to verify a user's identity.