Mike Reynolds​ This selection isn't available to us. Been waiting for chat support for 15 min now... We are running Exchange on-prem. We were using the old Outlook add-in, which was fine until it started locking up Outlook for many of our users. We've attempted uninstall and reinstall, only to get a blank add-in screen with no ability to use it. We were told we had to go the route of the 0365, which forces us to upgrade our Exchange servers to become compatible with API 1.3, which we are not ready for. This is nuts. We need compatibility with Exchange 2013/2016, and we need this to work or it will get scrapped, and potentially put the entire Marketo implementation at risk. ... View more