Missing "SharePoint OpenDocument Class ActiveX" in IE addons

Dear all ,

 We are having issues with our sharepoint and Reader DC and/or Acrobat STD 11.023/11.0.12 and/or Acrobat Pro 11.0.23/11.0.12,

We are missing the addon "SharePoint OpenDocument Class ActiveX" in IE,

To solve our problem, we need to have this addon activated in IE Addons,

Our computers are running the below configuration: Reader DC and Acrobat Standard 11.0.23

For some of them, this addon is showed in the IE addons, but for some others it is not shown and we do not how to activate/add it,

Thanks in advance for your help.