Linking Excel Workbooks

Excel Pro Tips

How to Fix Workbook Containing Unsafe External Sources Error

ExcelInsider Team October 20, 2025

featured image - this workbook contains links to one or more external sources that could be unsafe

When you open an Excel file and see the warning “This workbook contains links to one or more external sources that could be unsafe”, it means that your workbook is pulling data from another file or ...

Excel Pro Tips

How to Reference Another Excel Workbook Without Opening

ExcelInsider Team August 19, 2025

featured image - reference another workbook without opening in excel

When working with multiple Excel files, you might need to reference data from another workbook without opening it. This can be useful to speed up your workflow, reduce resource usage, and keep your ...