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The End of the REST API for On-Premises Mailboxes: A Preview

The End of the REST API for On-Premises Mailboxes: What You Need to Know
Introduction
For many years, the Exchange on-premises server has been the go-to platform for enterprise email. Organizations have relied on the robustness and flexibility of the platform to meet their messaging needs. With the increasing popularity of cloud computing, Exchange Online has become the primary platform for many organizations. Microsoft is continuing to promote the transition from on-premises to cloud-based solutions by discontinuing the REST API for on-premises mailboxes. In this post, we’ll discuss what this means for organizations and how to prepare for the transition.What is the REST API?
The Representational State Transfer (REST) Application Programming Interface (API) is a web-based protocol designed to facilitate communication between client and server applications. It is a set of rules and conventions that allow clients to interact with the server in a standard way. The REST API was used to access on-premises mailboxes in Exchange on-premises.Why is Microsoft Discontinuing the REST API?
Microsoft is discontinuing the REST API for on-premises mailboxes in order to encourage organizations to transition to Exchange Online. Exchange Online is the cloud-based version of Exchange on-premises and provides a more robust and secure platform for messaging. By discontinuing the REST API for on-premises mailboxes, Microsoft is making it more difficult for organizations to remain on the on-premises platform.What Are the Alternatives?
Organizations have several alternatives to the REST API for on-premises mailboxes. The alternatives include the Exchange Web Services (EWS), Exchange Remote PowerShell (ERP), and the Exchange Management Shell (EMS).Exchange Web Services (EWS)
Exchange Web Services (EWS) is a web-based API that allows clients to access Exchange data over an HTTP connection. It provides a robust set of features that allow developers to create applications that interact with Exchange data. The EWS API is available for both on-premises and online versions of Exchange.Exchange Remote PowerShell (ERP)
Exchange Remote PowerShell (ERP) is a PowerShell-based API that allows clients to access Exchange data over an HTTP connection. It provides a robust set of features that allow developers to create applications that interact with Exchange data. The ERP API is available for both on-premises and online versions of Exchange.Exchange Management Shell (EMS)
Exchange Management Shell (EMS) is a command-line interface that allows clients to access Exchange data over a secure shell connection. It provides a robust set of features that allow developers to create applications that interact with Exchange data. The EMS API is available for both on-premises and online versions of Exchange.Conclusion
Microsoft is discontinuing the REST API for on-premises mailboxes in order to encourage organizations to transition to Exchange Online. Organizations have several alternatives to the REST API, including Exchange Web Services (EWS), Exchange Remote PowerShell (ERP), and Exchange Management Shell (EMS). Organizations should evaluate these options and determine which one is the best fit for their environment. By doing so, they will be able to ensure that their messaging infrastructure is secure and reliable.
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The End of the REST API for On-Premises Mailboxes Preview

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