In Phase One: A purposive sampling was used to identify the sample of Veterans who have been Personally Authenticated for the Secure Messaging feature on My HealtheVet. Participants were recruited from two sites (Tampa n=18, Boston n=15). Phase 1 data collection procedures included: (1) surveys; (2) In-person interviews; (3) usability testing; (4) Secure Messaging secondary data collection; and (5) telephone interviews to complete study objectives.