Set up notifications for Root Tenant Group assigments

Question

Set up notifications for Root Tenant Group assigments azurerm_role_management_policy

I am trying to enable notification(email to slack channel) whenever someone requests for PIM role activiation. The slack channel contains the admins who can approve the request.

I am unable to fix this. Please advise how to enable the config ?

I am expecting this config should enable slack email when a user requests for PIM approval.

Here is the tf configs:

resource "azurerm_role_management_policy" "tenant_root_mgmt_grp_owner_role_mgmt_pol" {
  

  scope              = "/providers/Microsoft.Management/managementGroups/${var.mg_id}"
  role_definition_id = "/providers/Microsoft.Authorization/roleDefinitions/${var.roles["Owner"].id}"

  eligible_assignment_rules {
    expiration_required = false
  }

  active_assignment_rules {
    expiration_required   = false
    require_justification = false
  }

  activation_rules {
    maximum_duration                   = "PT8H"
    require_multifactor_authentication = true
    require_justification              = true
    require_ticket_info                = true
    require_approval                   = true
    approval_stage {
      primary_approver {
        object_id = var.groups["ad.azure.admins"].id
        type      = "Group"
      }
    }
  }
  notification_rules {
    # Purpose: Sends notifications when users request to activate their eligible roles # When: Triggers on every PIM activation request    
    eligible_activations {
      # Notifies the person requesting activation
      assignee_notifications {
        notification_level    = "All"
        default_recipients    = true  # Include the requestor
        additional_recipients = [var.pim_slack_email]  # Also notify Slack channel
      }

      # Notifies the approvers who need to action the request      
      # approver_notifications {
      #   notification_level    = "Critical"
      #   default_recipients    = true  # Include configured approvers
      #   additional_recipients = [var.pim_slack_email]  # Also notify Slack channel
      # }

      admin_notifications {
        notification_level    = "Critical"
        default_recipients    = false  # Skip default admin notifications
        additional_recipients = [var.pim_slack_email]  # Only notify Slack channel
      }
    }

    # Purpose: Notifies when users are made eligible for roles
    # When: Triggers when PIM eligible roles are assigned
    eligible_assignments {
      admin_notifications {
        notification_level    = "Critical"
        default_recipients    = false  # Skip default admin notifications
        additional_recipients = [var.pim_slack_email]  # Only notify Slack channel
      }
    }

    # Purpose: Notifies when permanent role assignments are made    # When: Triggers for direct (non-PIM) role assignments
    active_assignments {
      admin_notifications {
        notification_level    = "Critical"
        default_recipients    = false  # Skip default admin notifications
        additional_recipients = [var.pim_slack_email]  # Only notify Slack channel
      }
    }
}
}