The following versions are officially compatible with Windows Server 2012 R2:
Support for this version on Server 2012 R2 ended on January 14, 2020. While older builds may run, they can cause stability issues and will not receive new features. How to Download and Install download excel for windows server 2012 r2
How to Download & Install Microsoft Excel on Windows Server 2012 R2 (Official Methods) 2020. While older builds may run
Since you need Excel specifically, you will download the full Microsoft Office suite (you can choose to install only Excel later). For Windows Server 2012 R2, the last fully compatible versions are: download excel for windows server 2012 r2
To use Excel on this platform, you must typically rely on older standalone versions or specific deployment methods for perpetual licenses: Office 2016