Connection errors in QuickBooks often result from Windows Firewall blocking required programs or ports. Resolving the issue involves adding exceptions for QuickBooks files, opening necessary ports, and verifying security settings. These steps restore seamless access to online banking, company files, and payroll services, ensuring reliable operation and uninterrupted workflow.
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https://froodl.com/top-ways-to-rectify-windows-firewall-is-blocking-quickbooks
