Hi @GGe,
Welcome to Microsoft Q&A!
To create Excel VSTO Add-in project in Visual Studio, please view the document and you need to meet the following requirements:
- An edition of Visual Studio that includes the Microsoft Office developer tools. For more information, see Configure a computer to develop Office solutions.
- Excel 2013 or Excel 2010 .
It is noted that the office project templates are available only in Visual Studio 2017 with the Office/SharePoint development workload.
Sincerely,
Anna
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