You need to specify base DN. For Login DN just create a regular user account, something like ciscoldap. Here's the cli config:
aaa-server AD protocol ldap
aaa-server AD (inside) host WINDOWS_DC_SERVER
server-port 3268 (or 389)
ldap-base-dn DC=domain,DC=com
ldap-scope subtree
ldap-naming-attribute sAMAccountName
ldap-login-password
ldap-login-dn CN=ciscoasa,CN=Users,DC=domain,DC=com
server-type microsoft
!
tunnel-group GROUP type remote-access
tunnel-group GROUP general-attributes
authentication-server-group AD