Hello Maria.
It is nearing one year since I posted about this problem.
What you suggest has already been attempted.
The problem first occurred after upgrading to Windows 10. The problem is that Google does not consider Quickbooks (Webmail) to be sufficiently secure according to the messages. The only workaround (not a solution) I've found is to have a more secure password generated through Google/Gmail but this is cumbersome in that it needs to be entered each time. It does not get saved for reuse.
The steps are:
- Turn on Two Step Authentication
- Generate an App Password
- Enter this password whenever requested in Quickbooks (each time an invoice is sent)
