I've created calendar in SharePoint Online. Then I've added Attendees column with type User/Group.
After that I've created Workflow in SharePoint Designer to send email notifications for invited users.
I also can add SharePoint calendar as a second calendar in Outlook.
But I need to send invitations to users - special messages that user can accept or decline, and that event should be added to his own calendar in Outlook (not just in SharePoint calendar).
Is it possible to do?
Is it possible to send such invitations to external email addresses (users that has no access to SharePoint)?