I’ve had certain situations where a customer doesn’t understand how to set their own password when they receive their “welcome” email.

There are ways I believe to do this with the database, but I need a quicker or in some instance a dirty way to set a customers password.

Email Logs

If you are running a Magento 2 store you are probably sending out your emails from the server. This will allow you to see the welcome email with the instructions to setup a password.

Go to Stores –> Email Logs

There you will be able to click on the welcome emails sent to the customer needing help and you can view the email and interact with the email as if it was sent to you.