How to enable or disable Add-ins in Outlook 2013 / 2016?

Software | Microsoft Office

Open Outlook and click: "File".

Select: "Options".

Select: "Add-Ins".

Select in the Managefield: "Disabled items" and click: "Go".

Select the Add-In which one you prefere and click: "Enable".

Click: "Close".

Now, select in the Managefield: "COM Add-ins" and click: "Go".

Enable the Add-in which one you prefere.
(Disable the Add-in if you don't need the Add-in anymore).

Click: "OK".

The Add-in appears in Outlook.
Microsoft Office, Outlook 2013, Outlook 2016, Add-in, Add-ins