I'm trying to link virgin business account to quick books but at the end of the process it says "500 something unexpected happened" any idea what I'm doing wrong?

Hello Frazfab-outlook-, Welcome to the Community. Could we get you to open Quickbooks on a private/incognito window on the browser you're using and try and connect the bank again? If you get the same message. Can you go back to search the bank and make sure it is a Virgin business UK you're selecting by typing the bank in the search bar? If you are connecting via a mobile device can we ask you before trying the above to temporarily uninstall the bank app if you have it installed and try the connection again? Please then come back here if you need to. 

Hi did you manage to solve this issue? I’m having trouble connecting my virgin business account also. 

Let's link your bank account to QuickBooks Online so you can resume business activities, PB201.

Have you tried performing the troubleshooting steps provided in the above reply? If you do yet, the issue persists, I recommend checking with your bank's website to view any notifications or alerts.

For the time being, you can manually upload the transactions into QuickBooks Online. 

I'm also adding this link to know what to do with the downloaded transactions: Categorise and match online bank transactions in QuickBooks Online.

If you have any further questions regarding banking, I'll be here to assist.