I don't have MDTI in my lab but as Vlad said, look at the connector options. There is a drop down to select the types of indicators. This sends IOCs to the threat intelligence table. Alerting comes from your TI Map rules. So, you can also drill into the rule(s) generating these alerts for more options. Consider changing the KQL, threshold, or adding alert grouping.
You also have the option to use automation rules to auto close.