Follow up - do I need to wait until our new domain/website is launched to change the CNAME? The landing page settings has our current domain, homepage, and fallback page. I don't want to change that while we're still using our current site, right?
Yes, you have to get the timing right. Make sure all relevant pages are available and the new alias (CNAME record) has been created in DNS. Then set that alias to be the new Marketo Primary LP domain, and set the old LP domain as a Marketo Domain Alias (for backward compatibility).
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