You can view the current total number of managed users on the root page in the Active Roles console. Select the console tree root to open the root page in the details pane, and then expand the Product Usage Statistics area on that page. The count of objects under Active Directory Domains or AD LDS Directory Partitions represents the current number of managed domain users or managed AD LDS users, respectively.
NOTE: The count can be derived using the LDAP query “(&(objectCategory=person) (objectClass=user))”.
Path : Configuration ->Server Configuration -> Scheduled Tasks -> Builtin
Current : Number of user objects present when query executed to get the number of objects. That is the last time "Managed Object Counter" executed.