
4 respuestas
The Winter '15 release provides the ability to track both login and logout events.
For more information, see the release notes:
http://releasenotes.docs.salesforce.com/en-us/winter15/release-notes/rn_forcecom_security_elf.htm
https://success.salesforce.com/ideaView?id=08730000000Bqv8
You can get a list of active user sessions (i.e. logged in users) via <Your Name> Setup> Security Controls> Session Management or the API.