Another cause of the issue is sync timing. Office 365 itself is usually not the root of the problem - the mail clients (ActiveSync, iOS devices, iCal) and their connectivity protocol tend to be the culprits. For more information see: Microsoft Calendar Appointment Corruption Issues (August/2018 Update) and Exchange Outlook Calendaring Problems. This issue has been reported in organizations with Office 365, Microsoft Exchange, Outlook (2010, 2013 or 2016), Apple iPhones/iPads, Active Sync devices, Macs running Outlook for Mac, etc. Your mailbox should now load and be added.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.Note that you may then be prompted to enter your OU password a second time. Swipe right until your have the Add an Account button.

Click the Outlook App and then hit the Get Started button.Set up 365 email on your iOS devices through Outlook App Selecting “Contacts” will allow searching in the Global Address Book, as well as the syncing of your Outlook contacts to your device. To access email, “Mail” must be selected. Select the services you would like to sync with your device.Please note this prompt will help signify you are using modern and not legacy authentication. You should now receive a Duo prompt to approve.Enter your OU password in the Password field.Please note if you have an OU email alias configured, you must use that version of your OU email address for the username field. Enter your OU email address into the Username field.This can be anything you want, such as “OU” or “OU Email.” Type in a name for the account in the “Description” field.Type in your full OU email address in the “Email” field (ex.: If you have set up an OU e-mail alias (ex.: use this address instead.Tap on “Passwords & Accounts.” Alternately you may need to select Mail, then Accounts.Set up 365 email on your iOS devices through iOS settings Please note you will also need to setup Duo Multi-Factor authentication, as you may be prompted to approve the authentication of your username and password. If you are setting up your device or if you have recently changed your password, you may configure your device using the settings below. Please see this page for iPhone download options and this page for iPad download options. Word, Excel, PowerPoint, Outlook and OneNote applications designed for your iOS devices are now available for download.

Office 365 outlook iphone