CloudSOC UI currently does not have a feature to auto-send email notifications when a CloudSOC Administrator logs into the UI.
CloudSOC currently does not have this capability.
There are two work-arounds to get email notifications:
1. You can configure the Reporting Dashboard to send daily emails of CloudSOC Admin activities, which also includes login details.
2. You can configure the SIEM log forwarding to send all Investigate logs to your internal log collector and setup email notifications when a CloudSOC Administrator logs into the UI (Cloudsoc History Logs).