The latest version of Enterprise Reporter is compatible with Kerberos and you can safely disable NTLM traffic. For further information, there are a few resources to refer to:-
https://support.quest.com/technical-documents/enterprise-reporter/3.2.2/port-requirements
https://www.quest.com/community/enterprise-reporter/f/forum/27751/enterprise-reporter-using-ntlm
https://support.quest.com/enterprise-reporter/kb/327547/does-enterprise-reporter-support-ntlm-v2
Additionally, we can confirm that our communication is using WCF TCP Transport.