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Download OpenChange 2.2 NANOPROBE

OpenChange 2.2 NANOPROBE is the latest release available for download. Download packages for your Linux distributions, sources and GPG signature:

Sponsor: Zentyal eBook, all profits donated to OpenChange

“OpenChange technology has become a core part of Zentyal Server during the past years and besides actively contributing to the project by developing new features, submitting bug reports and patches, we believe it is also important that the project receives financial support” said Mateo Burillo, Training Manager at Zentyal.

All the profits generated by the book sales are donated in full by Zentyal to the OpenChange project.

Zentyal is an easy to use and affordable hybrid IT infrastructure, that is natively interoperable with Microsoft Active Directory® and Microsoft® Exchange Server.

Download and Purchase

OpenChange is a portable Open Source implementation of Microsoft Exchange server and Exchange protocols. It provides a complete solution to interoperate with Microsoft Outlook clients or Microsoft Exchange servers.

OpenChange client-side library is used in existing messaging clients and is the solution in new projects to communicate natively with Microsoft Exchange and Exchange-compatible servers. OpenChange server is a transparent Microsoft Exchange server replacement using native Exchange protocols and does not require any plugin installation in Outlook.

OpenChange is a member project of the Software Freedom Conservancy.

Learn more ┬╗


Latest News

OpenChange Hackathon #1

Wednesday, 19th November 2014

Today we are having a hackathon dedicated to the OpenChange REST API.

The list of project, progress, results and resources canbe found on the Hackathon webpage and will be updated all along the event. Work in Progress!

OpenChange 2.2 NANOPROBE Released!

Monday, 11th August 2014

The OpenChange project team is happy to announce a new release (2.2 "Nanoprobe") is now available for download.

This release is a major OpenChange release. It is designed to work with "4.1.11" release of Samba4 and a version of SOGo strictly superior to 2.2.7. See the release notes for more info »

Microsoft Plugfest 2014 slides available

Friday, 4th July 2014

The slides of the OpenChangeSim presentation (MAPI stress testing tool) given at Microsoft Redmond Protocols Interoperability plugfest (June 2014) are now available. You can download them either in ODP or PDF from 2 different locations:

OpenChangeSim 1.0 released

Friday, 13th June 2014

The OpenChange project team has just released the first version of OpenChangeSim. It implements a simulator able to reproduce the behavior of thousands of Outlok clients talking to an Exchange server at the same time. The tool will be demonstrated during the Outlook automation talk of Julien Kerihuel at Microsoft Redmond Protocols Interoperability Plugfest 2014.

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