I am working on ETL integration between ITA and 3rd party system (digitalor) the 3rd party system will develop a web services through https so my question now is that ITA etl communication can call digitalor web service through https?
In general, it should be possible. The ETL integration feature in ITA may support using the webservice through https. It might need some manual addition of the certificate somewhere on the server. For more advance/custom solutions I would actually recommend consulting the ACS team, they have a great experience with custom solutions and offer paid services.
Please let me know if you/customer would like to get in touch with the ACS team, thanks.