Hi there, Windy. It seems like you're referring to having different invoice message templates. When you mention a different invoice template, you will still be able to use the batch email function to send invoices to multiple customers with a unique email message template.

Here's how:

1. Go to Edit.
2. Proceed to Preferences.
3. Next, select Send Forms.
4. Followed by choosing Company Preferences.
5. Click on Add Template (input different email message templates for customers who have a card on file, a past due template, and a card declined template).

To batch send the invoices to different customers, you'll have to open each invoice first and place a checkmark for Email later.

Here's how:

1. Click on the File option.
2. Next, proceed to Send Forms (make sure that the option to combine forms in a single email is not selected).
3. Select each invoice individually to update the email message template to your chosen one.
4. Check other details for accuracy.
5. Click on Send Now.

For more details, please check this article: Email sales forms, invoices, and statements in QuickBooks Desktop. 

Additionally, you can visit this article to learn how to receive and handle customer payments for invoices and in-person sales: Take and process payments in QuickBooks Desktop.

I'm glad I could help you with your issue, Windy. If you have any more questions or need further assistance with sending batch invoices in QuickBooks Desktop or using email templates, please don't hesitate to return to this thread. I'll be here ready to assist you.