Explanation:

Step 1 - Requirement
The scenario requires using Microsoft Purview Insider Risk Management to import HR data (such as employee hire dates, resignations, and department changes). HR data connectors allow insider risk policies to use workforce signals to detect risky user activities.
Step 2 - What to do first
Before importing HR data, you must configure Insider Risk Management settings in the Microsoft Purview compliance portal. This is a prerequisite step that enables HR data connectors and policies to be created.
Reference: Configure HR data for Insider Risk Management in Microsoft Purview Step 3 - Import format HR data for Insider Risk Management is imported as a CSV file. The CSV must include required fields like user principal name, event type, start date, and end date. Other formats (XLSX, XML, ODS) are not supported by Purview Insider Risk HR data connectors.
Reference: HR connector CSV schema for Insider Risk Management