When a user navigates to the shared mailbox and clicks Send/Receive All Folders or Update Folder, it will not update. All other users in the environment do not have issues with shared mailboxes.
This shared mailbox having the issue was indeed over 2GB in size.There are numerous forum threads on the Internet with people experiencing this Outlook issue: This issue only occurs when shared mailboxes are being cached locally.I'm using Outlook 2016 on my mac connecting to office 365.I can add shared calendars fine, and most calendars work absolutely without an issue for calendars that have permissions set to User = Default, Role = Reviewer.The order in which it does this depends on your version of Outlook (see the table below).
While you can’t directly change the sync order, you can still influence it by selecting the folder that you want to have synched.
This issue has been reported in organizations with Microsoft Exchange, Outlook (2010, 2013 or 2016), Apple i Phones/i Pads, Active Sync devices, Apple Macs running Outlook 2011 or 2016, and RIM Blackberries.
For more information see: Exchange Outlook Calendaring Problems.
Microsoft and Google are the biggest competitors fighting for the leadership and market share, and all's fair in love and war… Anyway, apart from Google's Calendar Sync, there exist a number of ways and free tools to sync Outlook and Google calendars and hopefully this article will help you choose the best approach.
Using this method you can set up one way syncing from Google Calendar to Outlook.
Once Outlook is started and the cache has been updated, the synchronization is taking place based on timers and not on folders. Note 1: When Outlook is placed in “Work Offline” mode and you initiate a manual send/receive (keyboard shortcut F9), the currently selected folder does not have an affect on the synching order.