You might also find your answer in the LastPass Enterprise Manual.
How do I sync usernames and passwords with Active Directory?
Active Directory sync only pulls usernames, first and last name, email address, account status and group member from your AD system using LDAP. This data is transfered to LastPass using SSL. Users will be prompted to create a new master password after their account is provisioned. For full instructions on provisioning users with Active Directory, visit our the page on LastPass Active Directory Synchronization.