To send out the Parent Portal registration email, go the the Families tab > Family List. If you have more than 25 children on this list, you will need to make sure that all children are on one page. This saves you from having to do this a couple of times. To put them on one page, you will need to click on the top drop down and select Show All. If not, ignore this step. Click on the check box on the top blue bar (above the children's names) to select all children. Click on the top drop down and select Parent Portal Registration Email. You will see that you have two options: Send to All Guardians and Send to Primary Guardians. Choose whom you would like to send the registration email to. If you notice that there are either parents not on the mailing list or do not have an email inputted, go into their profiles to change this before sending out the email.
In this email, you can edit the subject line and body. Leave the Hi [FirstName] because this will input the first name of the parent based on the email inputted in Sandbox. You will also need to leave [Click Here to Sign Up] as this will be the link for to sign up. You can also select Send me a Confirmation email which will help you keep record of what you have sent out to parents. Click Send when you are all done.