The message QuickBooks Connection Has Been Lost appears when your program is unable to connect to the server or corporate file. Network problems, firewall settings, or improper configurations may be the cause of this. Checking your internet, making sure you have the right permissions, and reconnecting are the steps to fix it and get your QuickBooks data back to working order. For expert guidance and support regarding QuickBooks, give 1.855.738.2784 a call.