How to fix QuickBooks Error H505?

How to fix QuickBooks Error H505 ? follow these simple steps:- Check Firewall settings Navigate to window firewall settings & right click on Window Options. Now, input Firewall in the search Bar to press enter. Select Window Firewall & click on the Advanced settings option. Go left & right click ‘Outbound Rules’ to select ‘New Rule.’ Click on ports & press Next. Select TCP, then click Next. Select ‘Allow the connection’ open. Click on Next ‘to type in Name in the text field & press finish. Repeat steps 1-5 for inbound rules. Navigate to multi-user mode & open QuickBooks.