Here, to save Excel contacts to Outlook account, initially, you have to save the XLS file into CSV file format. And then import resultant CSV into your Microsoft Outlook account.

Microsoft Excel, a powerful tool for data management and analysis, now offers enhanced functionality by supporting the export of spreadsheets to CSV files (Comma-Separated Values).

Click "Export," then click "Save to Disk." Click "OK." Browse to the location where the file will be saved, then click "OK." Your Gmail contacts are exported to the CSV format for Excel.

How to Open Multiple CSV Files in One Excel Spreadsheet. The CSV file extension appears on text documents that contain comma-separated values. Like spreadsheet data, each line in a CSV file ...