Hi Sumit Singla ,
You can do it using tabcmd or creating alerts on server .
- Creating alert will be time taking but easy one - create one sheet for one customer and generate alerts .
- Other thing you can do is - using condition in one sheet for all users and add a threshold & send mail (subscribe it to a group of users )-but mail will be send to all users .
- Using tabcmd :: Send Email To "Selected/Dynamic" List of Email Addresses Immediately after Tableau Extract runs
Here instead of sending mails after tableau extract you will be sending mail after a threshold breach .
Please mark it right and helpful if this serves your purpose ,so that others can also get benefited .
VizAlerts allows dynamic recipients. It is a free and open-source (but not Tableau-supported) tool designed to work with Tableau Server for extremely flexible, conditional, email / SMS bursting. It will allow you to scale up to thousands of users, if you want, with no manual work. Building this as an Alert or a Conditional Subscription on Tableau Server would work, but only with manual work for each subscriber, as Nikher just mentioned. It would not scale to many.