Depending on your school profile's Access Model, you may need to approve parents' App Accounts before they can access the school profile.
You can also block App Accounts at any stage.
Instructions to approve App Accounts:
Hover over the name of an app account, and available options will appear.
If the account can be approved, click the Approve link.
If the account can be blocked, click the Block link.
You can revoke approval by clicking the Revoke Approval link.
You can unlock an account by clicking the Unblock link.