Overview
The Microsoft Excel Add-in and Microsoft Word Add-in are built by using the Office Web/JavaScript Add-in framework. This framework was originally released for Microsoft Office 2013 but received significant updates in Microsoft Office 2016. For more information, see Office Add-in host and platform availability. The Excel Add-in requires ExcelAPI 1.2. Therefore, use the Office Add-in host and platform availability matrix to determine which platforms support the Excel Add-in. For many users, the phrase “Excel 2016 with the latest updates” is sufficient.