Hello, @Tony-Z.
After doing some research on the investigation listed above, I discovered that our Engineers have prioritized getting this issue fixed, and they also provided a workaround that you can try to get the emails to send. You can close Outlook to allow the email to be created in Outlook, then you'll need to re-open Outlook and send/receive to send the email. Since the ticket isn't listed on the site, I suggest contacting our support team one last time, mentioning the investigation number (INV-0671), and telling them you'd like to be added to it so you can receive the email updates from our engineering team. This is the best way to get added to the ticket because they've all of your account information handy and can add your email to the list.
Feel free to let me know how the conversation goes below. I'm always here to help.
