I”m just researching Error #403 when attempting to perform updates on QB Desktop 2017 Premier
If you get error 403 in QuickBooks Desktop for Windows, here’s what you should do.
If you see “Error 403: Access Denied or Forbidden,” it indicates QuickBooks Desktop is unable to connect to our online services.
Start by adjusting one of your internet settings to resolve the issue.
In Internet Explorer, change the proxy server option.
Important: You may use this approach even if you don’t have Windows 10 or if you don’t use Internet Explorer. QuickBooks Desktop connects to our online services using Internet Explorer behind the scenes.
If you don’t see Internet Explorer on Windows 10, it’s because it’s not installed.
Edge has taken the position of Internet Explorer as Microsoft’s primary web browser. Internet Explorer, on the other hand, is still available on Windows 10. If you don’t see Internet Explorer on your machine, you can use Edge to open it:
Open the Microsoft Edge browser.
Select the three dots (…) in the browser window’s upper right corner.
Choose Internet Explorer as your default browser.
To modify the proxy server setting, repeat the procedures above.
To know more about Advantages of Using QuickBooks Premier 2018 Edition
https://www.accountspro.co/quickbooks/quickbooks-premier-2018-upgrade.html