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Each time a new version of Exchange Server is launched, users and experts welcome it warmly with great curiosity and zeal. Version after version, Exchange gradually evolved and matured. And integrated several new features (Autodiscover, Exchange CAS, Exchange Web Services, etc.) compared to the old versions, making them more convenient for Exchange users.
The article is going to discuss the term ‘modern’ Exchange and its importance compared to the old Exchange environment. But before that, let me tell you what version I am referring to old and which one comes under the modern title:
- Old Exchange Versions – Exchange 5.5, Exchange 2000, Exchange 2003
- Modern Exchange Versions – Exchange 2007, Exchange 2010, Exchange 2013, Exchange 2016, Exchange 2019, Subscription Edition, and Office 365
Exchange 2007 marks the commencement of modern Exchange versions. Though Exchange 2007 has some differences from Exchange 2013, Exchange 2016, and Exchange Server 2019, all of them together are included in the range of modern Exchange.
Modern Exchange vs Old Exchange | Features Difference
Check out this table to get a feature-wise difference between the new and old Exchange environment.
| Classic Exchange | Modern Exchange |
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Now, let’s discuss a few key changes in critical components in detail.
Core component advancement from old Exchange to new Exchange
The shift from the old Exchange to the new one has seen massive changes, from complete rewritten code to adapting to new architecture. Here, we are discussing the top key changes:
Exchange Client connection to Exchange Mailbox Server
The process of connecting an Outlook client to Exchange mailbox server is updated and made easy for users. Let’s see how it was done in:
- Old Exchange: Direct connection was established between clients & server by manually entering the specific server’s name. A single mistake can cause connection failure. And manually finding and fixing minor mistakes takes time, leading to downtime.
- Modern Exchange: Now, the clients can quickly connect via the Client Access Server (CAS). No need to know the server’s name. The CAS acts as a proxy and automatically routes the request to the correct mailbox.
Faster Outlook Mail Profile Configuration
Changes were made in the process of creating and configuring an Outlook mail profile for the user.
- Old Exchange: It was completely manual. Admins had to provide RPC Proxy settings, server names, etc. complex technical details. It was challenging and prone to errors.
- Modern Exchange: Integrated the Autodiscover service that automates the profile creation. The Outlook automatically connects to Active Directory and fetches the necessary configuration settings from the CAS to create the user profile.
Introduced Exchange Server Roles
Server roles are assigned to an Exchange Server instance. It helps to define the specific tasks that server will be responsible for, like routing, mailbox hosting, security, etc.
- Old Exchange: The legacy Exchange version (2003 and earlier) did not use role-based servers. Instead, every server was a complete package, that handles incoming requests and processing. This creates security issues, resource waste, and other issues.
- Modern Exchange: Starting from 2007, server roles concept introduced. The Exchange 2007 and 2010 use 5 roles (CAS, Mailbox, Hub Transport, Edge Transport, and Unified Messaging). But with 2013, roles were reduced to two (Mailbox and Edge Transport).
Real-Time Data with Exchange Web Services (EWS)
The process of Outlook retrieving the information from server is shifted from RPC protocol to EWS.
- Old Exchange: Uses the RPC protocol and Public Folders. The data was stored in folders and replicated across multiple sites so user can access data from different platforms (Apple, Windows, Linux). The data copying often leads to data sync delays and data inconsistency.
- Modern Exchange: Shifted to Exchange Web Services (EWS). Eliminated the heavy RPC protocol and used HTTP/HTTPS protocol to get data. It is fast, lightweight, and fits better with all platforms, not just Windows. With EWS real-time data retrieval was made possible.
Enhanced Server Security
Microsoft has added a dozen high-end security features and updated the basic security to enterprise-grade security mechanisms.
- Old Exchange: Mostly depends on firewall to protect the servers, but internally the server was endangered. The EDB and STM files were handled by the NTFS permissions, and the incoming request were isolated from the backend server with the Front-End and Back-End server concept.
- Modern Exchange: Introduced features like Data Loss Prevention, Multiple Factor Authentication, etc. Enabled detailed logging of every activity and implemented several security policies in accordance with the GDPR & HIPPA compliance laws.
Integration of Artificial Intelligence
Modern Exchange environments are getting something new with every release. But now they have apps powered by Artificial Intelligence (AI). The Exchange Server 2019 features various application that uses machine learning for fast analysis and reading emails. And the AI adoption continues with the latest Exchange Subscription edition.
Experts say the integration of AI and cloud computing in the Exchange Server is the most significant leap forward. A few Microsoft applications that make use of machine learning are:
- Microsoft 365 Copilot: Summarizes long email threads, draft responses, and schedule meetings based on user requests/prompts.
- Microsoft Viva & MyAnalytics: Uses AI to provide insights into work patterns.
Summing Up
From email sending button to how an email is delivered, Microsoft has recreated everything from old Exchange Servers to the new modern versions. The list of features is expanding every year, and it is crucial for businesses to keep up with the updates. But the process of updating Exchange Server is not an easy one-click job. Therefore, most admins now prefer to use an advanced Exchange Server migration tool for the move.
A specialized tool helps you to automate tasks like pre-migration analysis, adding users in bulk, setting up filters, and moving mailboxes. Kernel Migrator for Exchange is a powerful tool that can move mailboxes, Public Folders, and Groups data between any Exchange Server versions. It also allows us to migrate between on-premises and online Exchange Server.
Frequently Asked Questions
Ans. To move from Exchange 2016 to 2019 you need to setup the environment according to 2019 specifications and then create a migration batch to move the mailboxes.
Ans. Exchange On-Premises: Data resides in your own infrastructure, and you hold the complete 100% control over it.
Exchange Online: Users mailbox, Groups, and other data are stored in cloud (Microsoft’s own data centers). It’s a type of SAAS and organizations have less control over the components in comparison to an on-premises setup.
Hybrid Exchange: It’s a combination of Exchange On-Premises and Online.
Ans. Only basic AI services are free. But to use advanced generative AI features, you have to pay the subscription cost for every user.
