Microsoft 365 compliance center: Insider risk management – Native triggers for Azure AD account deletion
Automatically detect user account deletion in Azure Active Directory for your organization to start scoring for risk indicators in the Data theft by departing users policy template. This
is currently available in public preview.
More info: https://docs.microsoft.com/en-us/microsoft-365/compliance/insider-risk-management-policies?view=o365-worldwide#data-theft-by-departing-users