I have developed Outlook Web-Add in using Dot net Framework 4.6.1. I have deployed the manifest file and it is appearing well in the Outlook Client Ribbon. it is working well. The functionality is just to select the Outlook Mail and then click on the Outlook Web-Add in , it reads the Email data and do some action. Till here it is working as expected. Now i need to display the Add-In in Calendar view as well. what i meant is when i opened Calendar in Outlook, i can see the meetings. I will be selecting the meeting and action the Add-In. so that i will be able to read the meetings. I have tried google, but my Add-in is not appearing in Calendar view. Attached file... for more details. Please give some suggestions.