Remediation

From Azure Portal

1. From Azure Home select the Portal Menu.
2. Select Microsoft Defender for Cloud.
3. Under Management, select Environment Settings.
4. Click on the appropriate Management Group, Subscription, or Workspace.
5. Click on Email notifications.
6. Under Notification types, check the check box next to Notify about alerts with the following severity (or higher) and select High from the drop down menu.
7. Click Save.

From Azure CLI

Use the below command to set Send email notification for high severity alerts to On.

az account get-access-token --query "{subscription:subscription,accessToken:accessToken}" --out tsv | xargs -L1 bash -c 'curl -X PUT -H "Authorization: Bearer $1" -H "Content-Type: application/json" https://management.azure.com/subscriptions/<$0>/providers/Microsoft.Security/securityContacts/default1?api-version=2017-08-01-preview -d@"input.json"'

Where input.json contains the data below, replacing validEmailAddress with a single email address or multiple comma-separated email addresses:

{
    "id": "/subscriptions/<Your_Subscription_Id>/providers/Microsoft.Security/securityContacts/default1", 
    "name": "default1", 
    "type": "Microsoft.Security/securityContacts", 
    "properties": { 
        "email": "<validEmailAddress>", 
        "alertNotifications": "On", 
        "alertsToAdmins": "On" 
    }
}