BizTalk360 supports the following types of External Notification Channel options to trigger alerts from the environment to the users -
These external notification channels are (by default) inbuilt into the BizTalk360 application. The only step you need to do is to configure these notification channels with the appropriate URL, Access Token value (for Slack) and Authentication settings (for ServiceNow), and set up these notification channels with an alarm in order to receive the alerts in Slack/ServiceNow.
For more information about configuring these notification channels, follow the steps as discussed in this article. BizTalk360 also offers the capability for users to develop their custom external notification channels.