To provide a copy of a customer's invoice via Email:
Access the customer's invoice.
Click the Email icon in the upper right of the invoice.

This displays the Email Invoice window.

Enter the customer's email address (or is it auto populated with the billing customer's email?)
If applicable, check the Override Charge check box so that the customer will not be charged.
Note
If the Charge and Override check boxes are grayed, then you do not have permission to make changes.
Click Send to continue.
This sends a message to OSG, and from there the email with invoice copy is sent to the designated customer.
Email Confirmation Messages (and how to respond to an error message)
Email successful message

Error message

An email request error requires the rep to either reverse the Order or add an Adjustment crediting the amount of the email charge.