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I have a Office 365 user which his account is constantly being locked. &nbsp;I have tried so many things but not able to find out why his account is locked. &nbsp;<br />
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We have a AD Connect server which sync on prem user attributes to the cloud. &nbsp;<br />
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Question, if I remove his on prem AD account, let it sync to delete his account in the cloud. &nbsp;Then I create a new AD account for this user, sync it to the cloud. &nbsp;How do I soft match the new account to his previous mailbox in the cloud?<br />
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Please advise.
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I have a Office 365 user which his account is constantly being locked.  I have tried so many things but not able to find out why his account is locked.  

We have a AD Connect server which sync on prem user attributes to the cloud.  

Question, if I remove his on prem AD account, let it sync to delete his account in the cloud.  Then I create a new AD account for this user, sync it to the cloud.  How do I soft match the new account to his previous mailbox in the cloud?

Please advise.

Software an Azure AD account to a mailbox.

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.

Microsoft 365

Microsoft Azure is a cloud computing platform and infrastructure for building, deploying and managing applications and services through datacenters. It provides both platform-as-a-service (PaaS) and infrastructure-as-a-service (IaaS) services and supports many different programming languages, tools and frameworks, including both Microsoft-specific and third-party software and systems. Cloud Services is a PaaS environment and can be used to create scalable applications and services; there are specific software development kits (SDKs) provided by Microsoft for Python, Java, Node.js and .NET. Azure also has file and storage services, data management, analytics and DNS services.