Currently we maintain two separate identity services, a legacy OpenLDAP service and Active Directory. Crowd is currently using the legacy OpenLDAP service (configured as a "Delegated authentication directory" in Crowd). We are decommissioning the OpenLDAP service and need to convert Crowd to use AD for authentication, while retaining all of the users/profiles currently configured. All user data (usernames/passwords/etc.) are synchronized between LDAP & AD, so all user details will remain the same. What would the least-disruptive process be to complete that migration?