Outlook 2011 does not use Exchange Cached mode and directly connects to the Global Address Book (GAL) via LDAP connection.
In this case your global address book will update each time Send/Receive is pressed. There are a lot of resources to help you become familiar with Office 365.
As it contains many bug fixes and improvements over the outdated versions the phone and tablet manufacturers use, it may solve your sync errors. You might have encountered a data issue in the calendar system.
When changes occur within the main Global Address Book (GAL) on the Office 365, computers running Outlook 20/2016 may not automatically receive the updates.
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Some will even disallow access to the Exchange Active Sync server on the internal network.
That’s why we looked into some ways to integrate accounts within the most business-popular service, Microsoft Exchange Server. But first, let´s look at one option that allows you to synchronize your Exchange accounts mainly used in combination with Outlook. If you´re not satisfied with the possibilities of Microsoft´s default options, you can always let the synchronization be done by an external app that will do the work for you.
Imagine this situation: you’re working for company A but also for company B, both have their own Exchange servers leaving your email folders, contacts, calendars and notes separated into 2 accounts. The CB Exchange Server Sync is a simple, yet complex tool, powered by Connect Bridge.
Filter your mail at the server and stay up to date with all the changes automatically in i Phone Mail.
If you've noticed missing calendar appointments (e.g., lost meetings, delegate issues), or meeting updates from someone other than the original organizer, you're not alone.
You can use the stock calendar, S-Planner on Samsung phones, HTC Calendar on HTC, or Google Calendar's official app to test this.