Submitting form by email to include field value as CC

I have a text field (named DeptEmail), which automatically populates based on the selection from a dropdown field.  I want the text from DeptEmail to added as a CC when the submit form button is selected.

My inspiration came from the following link: https://acrobatusers.com/tutorials/dynamically-setting-submit-e-mail-address and my current JavaScript looks like this:

// This is the form return email.  It's hardcoded

// so that the form is always returned to the same address.

// Change address on your form to match the code below

var cToAddr = "email@email.com";

//Now get the CC email address

var cCCAddr = this.getField("DeptEmail").value;

// Set the subject and body text for the email message

var cSubLine = "CRT Submission";

var cBody = "This CRT and attachments are hereby submitted.";

// Send the entire PDF as a file attachment on an email

this.mailDoc({bUI: true, cTo: cToAddr, cCC: cCCAddr, cSubject: cSubLine, cMsg: cBody});

The button works on every level EXCEPT it does not add the CC.  Any suggestions?