Unfortunately those are the instructions for Outlook 2013.
Outlook 2016 does not have ''more settings''. Exchange accounts can only be added to Outlook 2016 using auto account setup. If autodiscover records aren't published, the administrator will need to publish them.
This is a change from Outlook 2013. If you want to use Outlook 2016 with an Exchange account, then Outlook must set the account up automatically.
Can you ask TCC Technology to check that auto-discover is set up on their exchange server. And look up the message boards on hw to set up Outlook 2016