Hello there, Tim Rogers.
Thank you for keeping us posted and for the detailed information you've added. I want to make sure you are taken care of.
Normally, the error message “Windows Firewall: Connection Sharing not allowed” that you're getting can be resolved by configuring the Firewall and Internet security settings in your QuickBooks Desktop.
In this case, it would be best to get in touch with our QuickBooks Care Team and ask for a case follow-up using your case number. They be able to pull up your account and provide updates about the progress of the investigation.
Here's how you can reach them:
We appreciate your patience. I'll be around in the Community if there's anything else you need help with. Just leave me a reply below and I'll get back to you.