As communnicated by MS, the preview version of Exchange Server 2016 is now available for download. Get your hands dirty with the new version of Exchange and share the experiences.

Download Microsoft Exchange Server 2016 - Preview

The fillowing articles are shared earlier in view of new features n Exchange Server 2016, go through then if you have not done so earlier.

Exchange Server 2016 Architecture, farewell to CAS role

Interested in reading more before download, please refer Announcing Exchange Server 2016 Preview!



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I recently posted couple of articles discussing the Exchagne Server 2016 features and changes (Exchange Server 2016 Architecture, farewell to CAS role & Coming Soon - A first look at Exchange Server 2016 & On-Premises Version is to Stay).

Take a look at the video, and explore more details on the new On-Premise version Exchange, Exchange Server 2016.



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The Exchange Server 2016 built on the similar architecture as in Exchange Server 2013, with one major change by removing the Client Access Server role. MS has removed Client Access Server role and introduced client access services to the Mailbox role. As a result, the Mailbox server role contains,

1. The logic to route protocol requests to the correct destination endpoint
2. Hosts all of the components and/or protocols that process, render and store the data.

It might remind some of us the architecture in Exchange Server 2003, but with a FE role. However, we still need to wait and see the actual product and its capabilities.

As per the introductory note, it is underlining that MS is not compromising the backend infrastructure client connectivity security. Even by removing the CAS role, no clients would connect directly to the back-end endpoints on the Mailbox server; instead, clients connect client access services and are routed (via local or remote proxy) to the Mailbox server that hosts the active database that contains the user’s mailbox.

There are changes in the architecture of DAG as well. As usual, the building block concept is still valid, as the additional mailbox servers can be added to form HA unit with the following additional enhancements,

1. DatabaseAvailabilityGroupIpAddresses is no longer required when creating a DAG. By default, the failover cluster will be created without an administrative access point, as this is the recommended best practice.
2. Replay Lag Manager is enabled by default.
3. Lagged database copy play down can be delayed based on disk latency, thereby ensuring active users are not impacted.
4. Database failovers times are reduced by 33% when compared to Exchange Server 2013.

The following diagram from MS shows the client protocol connectivity.

PA-Client Protocol Connectivity

This is not all, there are major other developments in the overall architecture, please follow the article from Microsoft Exchange Blog here. Happy reading.



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According to the information available from Microsoft Exchange Team, the on-premises release is planned to ship in the second half of this year (2015). As always, they convey the message that there are new features, enhancements, and refinements that add up to goodness on the way for end users, IT, and your organization as a whole. From the blog, some of the highlights of the new versions are,

  • - A new approach to document collaboration that makes it easy to send links and collaborate without versioning issues of attachments
  • - Faster and more intelligent search, to help users quickly find what they need in their mailboxes and calendars
  • - Significant improvements to eDiscovery search performance and reliability
  • - Better extensibility, including new REST-based APIs for Mail, Calendar, and Contacts that simplify web and mobile development

It is also unveiled that, some of these features are already birthed in the cloud, office 365 platform. Lets wait to see the enhancement that MS always committed to deliver.

Ref - Coming soon: A first look at Exchange Server 2016

I will try to grab information and share it with you all as and when it becomes available.



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