While we currently don't support MS Flow, you can configure SystemLink to send email notifications when alarms occur. In your case, you probably just need to launch the NI SystemLink Server Configuration utility, click on the SMTP tab to set it up.
Below is an example for how I have mine configured for a gmail account I use for testing.
Once you have the SMTP settings configured you can opt in to alarm emails from the web interface. From the Alarm Rules view, click on the gear in the upper right hand corner to open the Notification Strategies configuration view. From there you can add your email to a email group and include that email group in the strategy for any alarms you are interested in getting.
If you create a new notification strategy just ensure it is specified in the Alarm Rule.