When opening or updating a company file, QuickBooks Error 6123 appears. This error is frequently brought on by corrupted files, network problems, or incorrectly specified settings. Accounting processes are disrupted by this issue, which blocks access to firm data. Using QuickBooks File Doctor, fixing company files, or modifying firewall and hosting settings are all part of troubleshooting. Do you require QuickBooks assistance? For professional help, call 1.855.738.2784.