Partners who develop EAS on Android or iOS should first purchase an EAS license with Microsoft, followed by a Premier Support for Developers (PSfD) Agreement to properly engage support. How to Obtain Client-Side EAS Developers Support?

The Exchange ActiveSync Overview and Exchange Server Protocol Documents offer additional information about Microsoft’s implementation of EAS. Furthermore, EAS can work in real time to send push messages and calendar items as needed, as compared to fetching them from a server at fixed interval. In order to process these instructions accurately, EAS Protocol can be licensed by OEM vendors to develop software on the respective devices to enable new contacts, appointments, and tasks to be updated instantly on all devices.

It sends back the changes to the mobile device. The Exchange Server then processes updates it receives and resolves any conflicts. The device initiates a new sync by sending a set of updates to the server and requesting it respond with its own updates. Syncing is a process of reconciling differences between data on a device an on Exchange Server. Original Equipment Manufacturers (OEMs) such as Apple Computers and Samsung Electronics, license Exchange ActiveSync Protocol from Microsoft as part of a broader suite of Microsoft licensing solutions which helps them create more powerful mobile phones, tablets, wearable devices, and other software to enable users to access critical information from any locations.

The protocol is implemented with Microsoft Exchange server, and Office 365 platforms. Microsoft Exchange ActiveSync (EAS) Protocol is the language communicated between a mobile device and server to enable synchronization of emails, calendar items, contact information, tasks, and push accurate and reliable data. Senior App Development Managers David Huang and Sash Kavalaparambil introduce Exchange ActiveSync development support options.

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