You add new internal calendars in the same way as the integration with Google Calendars or MS OUtlook 365, i.e. in Calendar(link).
After clicking on the add internal calendar icon, you will see a right-panel where you can set:
Let ATS Recruitis automatically download your candidates from the Nelisa portal.
Combining the answers of a historically depersonalized candidate with a new answer.
The talent database does not have to be used only for searching contacts for candidates.