I followed the instructions indicated in the article. I sent an invoice to my wife's email since in the past I learned QBO won't send and invoice to the QBO account holders email (or at least that is what i was told by a QBO representative, low confidence). I received my copy but when I looked at the invoice listing in QBO I received a message that there was a problem and it did not send and to resend. 

But the invoice is in her inbox.

What next? It seems it is functioning correctly but telling me it is not.  Before It was not functioning properly and didn't give me an indication until after I opened the invoice and hit "save and send" only then it indicated there was a problem verify the email address and send again

It is better but there is still an issue.

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