How to send daily reminder to user.

There are a couple of ways to achieve this. The simplest way is to assign a User Input Task (UIT) to the User and then user the "Escalations" on the UIT to send the reminders. Before you actually do this I would recommend you define and agree an "Work Management Pattern" e.g. "3 strikes and you're out" where you Escalate once, then Escalate again, and then Escalate once more, and the re-assign the Task to a Manager.

I say this is the simplest way...but it comes at a cost. Because you have a Task (which is sitting in an active process) this will occupy memory. If you have a very large number of these then your environment might be subjected to memory resource issues.

An alternative pattern is to have a database record act as a Task. These are then instantiated into a Process "on demand" (i.e. when a User clicks on a link or an action). You can then have a single process that runs periodically (e.g every night) that examines all the open Tasks in the database and determines which need a reminder sent. You'd then send the reminder as an email.

Hi, you can configure the trigger for the start node and select the process to run daily