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This is a known issue which has no native solution that I know of. However, you can sync Outlook contacts (together with calendar items and tasks) easily with the following free tool: <a href="https://www.codetwo.com/sync-for-icloud/" rel="ugc">CodeTwo Sync for iCloud</a>.
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This is a known issue which has no native solution that I know of. However, you can sync Outlook contacts (together with calendar items and tasks) easily with the following free tool: CodeTwo Sync for iCloud [https://www.codetwo.com/sync-for-icloud/].

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Got the solution. Thanks SysTools.
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I want to merge the contacts of my Outlook.com account with my iPhone address book. I tried to do that but, not able to do so. If anyone know why Office 365 contacts not syncing with iPhone and how to export O365 contacts to iCloud account?
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I want to merge the contacts of my Outlook.com account with my iPhone address book. I tried to do that but, not able to do so. If anyone know why Office 365 contacts not syncing with iPhone and how to export O365 contacts to iCloud account?

Office 365 contacts not syncing with iPhone

Microsoft Office is an integrated suite of applications that includes Outlook, Word, Excel, Access, PowerPoint, Visio and InfoPath, along with a number of tools to assist in making the individual components work together. Coding within and between the projects is done in Visual Basic for Applications, known as VBA.

Microsoft Office

The iPhone is a smartphone made by Apple Inc. It and the iPad, along with several other mobile devices from Apple, run on the iOS operating system, which has its own topic, as does the iPad for device-specific questions. Native iOS applications are written in Objective-C or in Swift using the Cocoa Touch frameworks or HTML5 compiled with the help of a package manager such as Adobe PhoneGap; a common IDE is Xcode.

iPhone

Office 365 is a group of software plus services subscriptions that provides productivity software and related services to its subscribers. Office 365 allows the use of Microsoft Office apps on Windows and OS X, provides storage space on Microsoft's cloud storage service OneDrive, and grants 60 Skype minutes per month. Office 365 includes e-mail and social networking services through hosted versions of Exchange Server, Skype for Business Server, SharePoint and Office Online, integration with Yammer, as well as access to the Office software. All of Office 365's components can be managed and configured through an online portal; users can be added manually, imported from a CSV file, or Office 365 can be set up for single sign-on with a local Active Directory using Active Directory Federation Services.