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If you are not sure which add-in is right for you, please check out this article: 
Which add-in to use?
Office add-in | COM add-in | |
|---|---|---|
Windows | Outlook 2013, 2016, 2019 Office 365 or Exchange Server 2016 CU5 | Outlook 2010 or newer Windows 7 SP1 or newer .Net Framework 4.7.1 or newer IE11 or recommended Microsoft Edge WebView2 runtime |
Mac | Outlook 2016, version 15.37 or newer Office 365 or Exchange Server 2016 CU5 | not available |
Web | Office 365 or Exchange Server 2016 CU5 | not available |
Mobile (Android & Windows) | Outlook mobile app Office 365 | not available |
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