In July 2019, we announced the preview in Outlook for Windows which has remained opt-in until now, as we turn this on in production. Right now, about 10% of Outlook for Windows users in Current Channel with version 2103 have been enabled for those improvements, and we’ll keep expanding gradually throughout the spring and summer. The improvements have been released in Outlook on the web, the new Outlook for Mac, and mobile for a while now, and we’re excited that Outlook for Windows is now enabled as well. It is with great excitement that we are announcing that we have graduated the shared calendar improvements in Outlook for Windows out of preview! This new shared calendar experience dramatically improves the reliability and sync latency for shared calendars & delegated calendars in all Outlook clients.
