There are quite a few other things that don't work with, such as calendar overlays - the ability to display multiple calendars on a single calendar page. LOts of other weirdnesses too.

> Enables a webpage to display a contact card and presence status for people. Integrates through client-side APIs with Office client and Skype for Business client.

It's crazy that modern sharepoint version still use ActiveX for something like this imo. I wonder if Microsoft's newer web APIs could be used to reimplinent this functionality without ActiveX