Cross domain visitor tracking

I was wondering of it is possible to track visitors across domains. For example, there is a single sitecore instance, using multiple sites.

A visitor is visiting SiteA, a profile is created. After the users visit, the user is visiting SiteB(running on the same instance). Can this visit be linked to the first profile(from SiteA), both as anonym ous user?

  • In reply to Gert Gullentops:

    True, till that moment, there is no way to merge the data because of the different analytics sessionID's.

    Conclusion: cross domain visitor tracking is only possible using the FXM.

    Otherwise, a new visit equals a new ID and is tracked as a new visitor.

    Thanks for the answers!