when creating a session (Training Center -> Schedule Training), is there some field that is hidden (not visible anywhere for end user),
but can be used for trainer internal purposes? Like some private "tag" field?
The only thing I can think of that might be usable in such a way would be the WebEx Tracking Codes, Manage Tracking Codes (WBS30) | Cisco Cloud Collaboration Help Central
The WebEx API's can handle tracking codes, as well as the native UI.