Each domain monitoring subscription is tied to a single email address. If you'd like multiple people to receive an email when a monitored domain is impacted by a data breach, create a distribution list at your mail server, add members to the list then use the address of that list for your subscription. For example: https://learn.microsoft.com/en-us/exchange/recipients-in-exchange-online/manage-distribution-groups/manage-distribution-groups
Can multiple email addresses receive an alert when our domain is impacted by a data breach?
