To pre-populate the fields in your support ticket form/embed, add support.registrationDefaults to your Outseta Script Options.

👉 To pre-populate fields in a sign up form/embed, use auth.registrationDefaults.
👉 To pre-populate fields in a lead capture form, use leadCapture.registrationDefaults.

Follow the pattern below (see bold) to add your support registration defaults to the existing Outseta Script and Options you set up initially to add the support ticket form/embed.

<!-- Outseta Script Options -->
<script>
var o_options = {
domain: '[your-domain].outseta.com',
load: "auth,profile,nocode,support",
// ✨ Add the relevant lines below to your current sites's head
support: {
formDefaults: {
Subject: 'A prewritten subject line",
Body: `A prewritten body`
}
}

};
</script>

<!-- Outseta Script (doing all the magic) -->
<script src="https://cdn.outseta.com/outseta.min.js" data-options="o_options"></script>

Full demo on Code Sandbox