How to Resolve Error: Cannot Communicate with the Company File due to Firewall? Get instant help with customer service When your Quickbooks sends you an email alert, it may appear to be legitimate. However, if you see the following error message: "Error: Cannot Communicate with the Company File due to Firewall?" or "The connection request to your company file failed. Please check the firewall settings on your computer." This means that you are experiencing a firewall-related issue and need to contact your IT department about how they can resolve this problem. The error "Cannot Communicate with the Company File due to Firewall" is caused by the firewall of Protectron, your company's IT partner. A firewall blocks communications between two computers in order to prevent unauthorized access. This error is usually fixed by contacting Protectron's technical support team. This error message is usually given if Quickbooks Error Support (855)756-1077 can...