How do i add multiple customer emails?

I would be happy to help you with this @airmods1191.  While there's a 100-character limit for the cc field, you might want to consider entering the remaining email addresses in, we can enter multiple email addresses in the Customer Information.
Here’s how: 

1. Click Sales, then choose Customers.
2. Choose a customer.
3. Select the Customer Details tab, then click Edit.
4. You can enter the email addresses in the Email field.
5. Click Save.

I hope this is helpful! Let us know if you need anything else by leaving a comment below.