This feature from Cisco Duo allows you to import all the usernames and other information from your Active Directory (AD) Forest, Domain, or Active Directory Lightweight Directory Service (AD LDS) instance into Duo with Duo Security's Directory Sync feature.
A one-way operation, the process ensures that no information from Duo is copied to your AD. The sync process runs daily or can be run on demand using programmatic techniques via the Duo API.
Read the Synchronizing Users from Active Directory article before attempting to handle the Sync process. The article can be found here.
The contents of Synchronizing the Cisco Duo Directory
