This form gives you two ways to add Subjects to your Study — one at a time, or a “bulk enrollment” option.
The latter requires you to prepare your list in a certain fashion — one subject per line in a particular format. The Preview Subjects button is very important! You should use it to check the list of users you’re trying to enroll. It does a simple reality check on your data to spot obvious errors, though it does not check whether the email addresses are active. You may end up with bouncing emails, but usually this step will let you spot most errors.
This screen-shot shows the result of the Preview — showing you that one of the addresses checks out but the other has an error.
Always use the Preview!