Editing a meeting series end date will not reset past meeting details: Past m eeting details won’t change nor will you see this message: “ If you changed specific appointments in the series, your changes will be discarded and those appointments will match the series again.”.Previously, the organizer and other attendees would not see your response if you did not explicitly choose to send one. ( NOTE : This improvement also applies if you chose not to send a response when tentatively accepting or declining a meeting request.) Accept a meeting without having to send an email response: If you select Accept > Do Not Send a Response, others can still see your response in the Tracking tab.Instant sync of shared calendars: Previously, if changes were made to a shared calendar, it could take up to a few minutes for the shared calendar recipients to see the changes reflected in their view of the shared calendar.What kinds of improvements have we made? Here are some of the highlights. You might have already noticed some of these enhancements if you use Outlook for Mac, Outlook on the web, or Outlook Mobile. We have dramatically improved the reliability and sync latency for shared calendars and delegated calendars in Outlook across platforms. I’m excited to share some great improvements we’ve made to shared calendars in Outlook for Windows. It's working okay on the Outlook mobile app.Hi, Office Insiders! My name is Julia Foran, and I’m a Program Manager on the Outlook team. We've tried to change the amount of emails stored in the OST files but that hasn't helped, and also change sync settings locally in Outlook which hasn't helped either. We've tried disabling Cached Mode completely which led to Outlook being quite slow and stuttering. One issues we've noticed is that on the Outlook desktop app, the emails are not syncing in properly. We've configured everything and currently in process of running some tests on few of us in the IT department who have already migrated their accounts to O365. We're planning on migrating our Exchange server (currently 2013) into Office 365 with a Hybrid Setup (Office 365 and Exchange).

Outlook 2016 sync issues from update