It’s easier to discuss your situation without the business-specific term “Advisor.” Let’s talk about Marketo people, since that’s the term within the platform.
1) For the ON24 integration, when an unknow Marketo Advisor registers, will a record in Marketo be created and or will they receive a “thank you” for registering email (assuming we have that set up in Marketo)
Whenever someone fills out a Marketo form, a person record is either updated or created. There’s no way to have a form fillout without a person existing in Marketo afterward. So unless you’ve specifically excluded net new people (created by the form) from notifications or other actions, they’ll go through the same steps as everybody else.
2) When Advisors register for an ON24 webinar, we receive a record for the user in CDP. For some of the registered users, we receive an email address that does not exist in CDP; they may have used a personal email address. Does our Marketo integration with CDP prevent us from creating new users with just an email address from CDP?
It’s impossible to say how your CDP pulls updates (or, perhaps, receives updates via webhook) from Marketo. You’d have to detail that for us. But if the CDP requires, say, a non-empty Last Name and Company, then it would reject the update. But this has nothing to do with Marketo rejecting the update, it never cares if someone is email-only.
.png)