QuickBooks Error 6123 occurs when users try to open or restore a company file, often due to network problems, file corruption, or conflicts with security software. This error disrupts access to important financial data and can happen in both single-user and multi-user modes.

To resolve the issue, users can try solutions such as using the QuickBooks Tool Hub, renaming configuration files, or temporarily disabling antivirus software. Understanding the cause of Error 6123 is key to quickly troubleshooting and restoring access to your company file.

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