How do I require all my current customers to sign/agree/re-agree to some new policies that we just added?

Go to Tools > Parent Portal > Settings and and enter a date in the Policies Agreement Date box field that is the date you revised your policies. You also need to enter text into the Policies Agreement Message Text box. This text will then prompt and force all families logging into the portal to read, agree to, and provide e-signature for the new policies. Their e-signature is then stamp-dated and archived. For more information see the Portal Legal Policies page.