TABLE 2: Microsoft S/MIME Client Feature Comparison
	Outlook 2000 Corporate/Workgroup Mode (1)	Outlook 2000 Internet Mail Only Mode (1)	Outlook 2000 Express 5.0 (2)
Encryption key recovery	Yes	No	No
CDP support	Yes (3)	Yes (3)	Yes
Private key storage	Protected Store, optional Syskey protection	Protected Store, optional Syskey protection	Protected Store, optional Syskey protection
Support for clear and opaque signing	Yes	Yes	Yes
S/MIME enrollment	KMS, internal CA, commercial CA	Internal CA, commercial CA	Internal CA, commercial CA
S/MIME enrollment initiator	Administrator (KMS), user (other)	User	User
Certificate renewal	Automated (revocation, expiration)	Warning (revocation, expiration)	Warning (revocation, expiration)
LDAP support	Yes (4)	Yes	Yes
PKCS #12 support	Yes	Yes	Yes

(1) Outlook 2000 Version 9.0.0.2711

(2) Outlook Express Version 5.00.2919.6700

(3) To enable CDP support in Outlook 2000, you must create the HKEY_LOCAL_MACHINE\SOFTWARE\ Microsoft\Cryptography\{7801ebd0-cf4b-11d0-851f-0060979387ea} registry key, add the PolicyFlags Registry value, and set it to 0x00010000.

(4) To enable LDAP support in Outlook 2000 Corporate/Workgroup mode, you must add the LDAP Directory Service to the Outlook Profile.