It is recommended that at least one valid contact is configured for the security center. Microsoft will notify the security contact directly in the event of a security incident using email and require alerting to be turned on.
The ability to react to high severity notifications could be delayed
Set alert notifications to be on
The following example will fail the azure-security-center-alert-on-severe-notifications check.
The following example will pass the azure-security-center-alert-on-severe-notifications check.