Hi, is there a way to send a triggered email to 2 different users at once?
You can't send it at the same time (there's only room for one recipient), but you can do it one after the other.
Note that if you send to a site member, you can only send an email to the currently logged in site member.
In case you are using the CRM API for sending email, you should be able to send it according to the contact id.
Let me know if you need any further assistance.