问题：公式前显示 _xlfn. 前缀 - Microsoft 支持
解决方法. 删除不支持的函数，或者，如果可能，请将不支持的函数替换为支持的函数。. 注意: 如果你有 Microsoft 365 订阅 ，则这些函数可用。.
Applies To:
Excel for Microsoft 365, Excel for Microsoft 365 for Mac, Excel for the web, Excel 2021, Excel 2021 for Mac, Excel 2019, Excel 2019 for Mac, Excel 2016
Issue: An _xlfn. prefix is displayed in front of a formula
Resolution. Remove the unsupported functions, or if possible, replace the unsupported functions with supported functions. Note: These functions are available if you have a Microsoft 365 subscription.
Applies To:
Excel for Microsoft 365, Excel for Microsoft 365 for Mac, Excel for the web, Excel 2021, Excel 2021 for Mac, Excel 2019, Excel 2019 for Mac, Excel 2016
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Applies To:
Outlook for Microsoft 365, Outlook for Microsoft 365 for Mac, Microsoft 365 for home, Office for business, Office 365 Small Business, Microsoft 365 admin, Office 365 operated by 21Vianet, Office 365 operated by 21Vianet - Small Business Admin, Outlook.com, Office 365 operated by 21Vianet - Admin, New Outlook for Windows, Outlook for iOS, Outlook for Windows Phone 10, Outlook Mail for Windows 10, Outlook on the web for Exchange Server 2016