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What impact does this have on your marketing? Here are a few things that will be change.

1. Activity Profiles Will Be Incomplete
Do people visit both your microsite and your core site? (Hopefully they do, otherwise why do you have a microsite?) You will have two profiles for every visitor and you will not have a complete view of what a visitor has done.

2. Dynamic Content Triggers Will Misfire
Someone may be highly engaged on your microsite, but your dynamic content triggers will show basic 101 content when that same person comes back to your corporate site to learn more. All of the inferred preferences you picked up about a visitor, from content formats to industry, is lost when someone crosses domains.

3. Visitors Will Need To Register Multiple Times
Many marketers today recognize a return visitor and don’t ask visitors to register a second time.

However, if someone registered on your microsite and then visits your corporate site, they will need to register again. Your content, which could have been freely distributed, now is put back behind a registration form, limiting its distribution.