Transferring/Sharing Cookies Between Domains

Description description

You are re-branding your domain and would like to know if it is possible to transfer cookies from one domain to another.

Resolution resolution

Munchkin creates and tracks individual cookies on a per-domain basis, so for known-lead tracking to occur across domains, a lead association event must occur for each domain. For example, if I control two domains, marketo.com, and example.com, and a lead fills out a form on marketo.com, then navigates to example.com later, then their activity on marketo.com will be tracked on a known lead record, but their activity on example.com will be anonymous.

Known leads will persist across subdomains however, so a known lead on www.example.com is also a known lead on info.example.com.

Marketo Developer Docs - Lead Tracking

While there are general approaches to sharing cookies across domains, this is outside the scope of Marketo Support.

The best point of contact will be your web developer and they will be able to help you out on this regard.