I have ArcGIS Desktop 10.8.1 with Excel 2016. I installed X-Ray for ArcCatalog. However, the extension does appear in Customize - Extensions. When I choose Customize - Add-in Manager, in this window is shown X-Ray for Geodatabases under My Add-Ins. Refer to screenshots included here.
Not sure if I should try to use ArcGIS Desktop 10.7? I was told it will work in 10.8.1, but never tried it until now. I know the ESRI site says only up to 10.7.
Anyone get X-Ray for Geodatabases to work in ArcGIS 10.8.1?