How to send an email to a user that I add a new access level [CB Auto Acion]

I would like to use CB Auto Action to send an email to a user that I add a new access level to give him additional information about it.
Is it possible to do it using CB Auto Action?
How can I do that?
Which trigger I should use?
Is there other way to do it?

Yes, that's doable. You'd act on the onAfterUpdateUser trigger, which is fired when a user is updated from backend. You'd then just use an Email action or whatever action you want really.

Hi, Kyle.
Thanks for your quick reply.

Which field should I use to check the new access level?
How can I control if I have already send the e-mail ? Should I create a new field to control it like the video tutorial?
Could you give more details how can I do this?

Which field should I use to check the new access level?

That trigger is fired after your new usergroup has been added so you can just set the Access parameter of your action to it and should work fine.

How can I control if I have already send the e-mail ? Should I create a new field to control it like the video tutorial?

That's basically the only way to do it. You have to have some means to keep track of if they've been emailed or not. Maybe subscribe them to an AcyMailing newsletter that's configured to send to each email address only once otherwise you'll need to use a field to keep track of if they've been emailed already or not.

Could you give more details how can I do this?

Below should get you started.

Global
Triggers: onAfterUpdateUser
Type: Email
User: Automatic
Access: YOUR_USERGROUP_HERE
Action
To: Subject: You've been given XYZ access!
Body: You now have access to XYZ!