Thank you for the idea @Fiat Lux - ASIA

I downloaded and installed Quickbooks Desktop Pro 14 and no luck. Same IE error on startup. We knew that might happen but it was worth a try.

I posted about this problem on the Microsoft forums and one of their employees was good enough to help submit a email request to the Microsoft Team responsible for helping users with implementing Microsoft Edge's IE compatibility. We'll see how that does. If I works out, I'll post the results here for everyone.

Take care,

Mike Vail