Office 365 Add-Ins Discovery and Inventory

I wonder to know if anyone tried to scan for Office 365 Add-Ins.

I have received that question, but cannot find any useful Symantec KB article.

Please read here:

https://appfluence.com/productivity/best-word-powerpoint-excel-outlook-team-addins/

Any idea (that works) would be welcome :-)

Thanks,

Jan