The official documentation from Salesforce is to use Salesforce Data Extensions if you want to push tracking information from Marketing Cloud to Salesforce (https://help.salesforce.com/articleView?id=mc_co_salesforce_data_extensions.htm&type=5).
This is what we've done but I've noticed that after creating data extensions in the data extensions folder, emails sent are still being tracked and tracking is still being sent to Salesforce.
My question is can I create data extensions anywhere and tracking will always be sent to sales cloud? what do i need to look out for to insure that tracking is being sent?