FAQ (Developers): How to query for Outlook Express / Windows Mail items using PKEY_Identity / System.Identity

PKEY_Identity (or “System.Identity”) is used to store the identity GUID associated with an Outlook Express or Windows Mail (Vista) account.

Tom Laird-McConnell, who used to be my boss until a few months ago, wrote one of his extremely rare blog posts last week on this subject.  To celebrate the occassion, I will link you there for the detailed answer to this question.

Definition of the PKEY_Identity / System.Identity property at Tom’s Handy Dandy Space