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MS Exchange Server 2019 updates will put more stress on security and less on the functionalities department. The ultimate goal is to ensure a consistent on-premises experience. The CU updates with potential functionality changes will be separated from security updates so that admins can decide what to implement. It brings in some new features to the mail and calendar server, including improvements when it comes to security and performance.
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Meta Cache Database
If you have your own (physical) server and equip it with SSD drives, you can use the Meta Cache Database (MCDB) on Exchange 2019. MCDB is already used in Microsoft 365. With this method, meta information is stored around the mailbox (for example, the folder structure). This accelerates access and search and gives administrators the option of accommodating more users in one server instance. This in turn, can reduce costs.
Dynamic Database Cache (DDC)
Dynamic Database Cache (DDC) also makes the Exchange Server faster. Administrators specify how much storage space a database can occupy on an Exchange Server. However, the number of active database changes resulted in poor utilization because available storage remains unused. In Exchange 2019, DDC allows the allocated storage capacity to dynamically adapt to the situation.
Microsoft has completely rebuilt the search index in Exchange 2019. In earlier versions, the index was separated from the mailbox database. This is no longer necessary in the new version of Exchange Server. The search index is now located directly in the mailbox database. This makes the administration much less complicated and also increases the speed of the search.
Exchange 2019 also provides the end-user with new functions, all related to the calendar. With the “Do Not Forward” function, users who have created a meeting specify that invited users are not allowed to forward this invitation. This allows the creator of the event to retain control over who is part of the meeting. In addition, Exchange Server 2019 gives users more options to create an Out of Office message: If you are not in the office for a certain period of time, you can block your calendar for that period. This includes automatically rejecting meeting requests for this period.
E-Mail Address Internationalization
Something else interesting for end users: Email Address Internationalization (EAI) ensures fewer problems when sending emails in a global context. International email users are no longer restricted to the limited ASCII code (based on the English alphabet). Instead, the extended UTF-8 can be used. To achieve this, the address had to be converted in earlier versions of Exchange. This is no longer necessary. In Exchange 2019, EAI allows email addresses with international characters to be used.
For some companies, this is not an important problem: As of Exchange Server 2019, Microsoft will no longer continue their Unified Messaging (UM) service. In previous versions, the server offered extensive voice mail functions. If you don’t want to miss out on these features in the future, you will have to switch to another service. Microsoft itself is dropping UM in favor of Skype for Business, which has a similar range of functions. Cloud voicemail, which can then be accessed with Skype for Business, is an integral part of Microsoft 365, Microsoft’s SaaS solution. Accordingly, companies are to switch to the cloud service.