As with every new version of Windows Server, dozens of innovations have been added to the operating system’s capabilities. Focus on 3 major changes of the Window Server 2025 edition that are sure to appeal to the most demanding CIOs.
– In partnership with Microsoft
The new Windows Server has arrived! Officially available since November 2024, the new version of Microsoft’s server operating system brings its share of new features that aim to strengthen security, improve performance and offer more agility in increasingly hybrid environments.
Hotpatching for more security and availability
One of the most anticipated new features in Windows Server 2025 is the expansion of the hot update capability. Windows Server Datacenter Azure Edition users have been taking advantage of this functionality for several years. Hotpatching is now coming in the Standard and Datacenter versions, for physical and virtual machines, deployed on-premises or in a multi-cloud environment. The activation of the service will have to be done through the Azure Arc agent.
What is hotpatching? It is the ability to apply Windows Server security updates without having to restart the machine; therefore, without interruption of service. This has two important advantages for the organisation. First, enhanced security with gaps that can now be closed much faster, and second, a reduction in business impact. For organisations whose operations depend on one or more critical applications running 24/7, even the slightest minute of downtime can have an impact on the business.
With the previous version of Windows Server, the server had to be restarted at least once a month to apply Microsoft’s monthly security patches. In 2025, this will only be required once a quarter, reducing the number of reboots from 12 times a year to just 4.
GPUs exploited to the max
More and more applications are using AI capabilities, and more specifically Generative AI. To run them efficiently, companies are turning to servers equipped with GPU accelerators, such as Dell PowerEdge AI servers. But this equipment comes at a cost, so IT teams are looking to optimise their use as much as possible.
Windows Server 2025 addresses this issue with GPU partitioning functionality.
GPU partitioning in Windows Server 2025 allows you to share a physical GPU device among multiple virtual machines (VMs). Each VM gets a dedicated fraction of the GPU, rather than the entire GPU.
Imagine you have a server running Windows Server 2025 with a powerful GPU installed. You want to run multiple virtual desktop infrastructure (VDI) environments on this server. Instead of assigning the entire GPU to one VM, you can partition the GPU into smaller segments and assign each segment to different VMs. This way, each VM gets the necessary GPU resources to run graphics-heavy applications like Microsoft Office and visualisation tools.
Windows Server 2025 supports live migration and failover clustering, ensuring high availability and reliability for mission-critical applications.
Active Directory: Performance, scalability, and security
The reference directory in companies is getting a new lease of life with Windows Server 2025. While it had changed little in recent years, Active Directory benefits this time from many new features.
Starting with its architecture, the database is now based on 32k pages instead of 8k. In practical terms, this means that each AD object will be able to store more values and attributes, ensuring greater scalability, especially within large organisations.
Another new feature is that Active Directory is now compatible with the NUMA (Non-Uniform Memory Access) architecture, which means that it is able to take advantage of all CPUs, in all CPU groups, and not just in group 0.
Also of note is the appearance of a new service account: the Delegate Managed Services Account, or DMSA. This new delegated service account benefits from automatic password management and access to multiple servers as well as random keys and password storage directly in the AD, never locally. Effectively, an additional guarantee of security for companies.
Dell and Microsoft, together towards the modern data centre
It is impossible to list all the new features of Windows Server 2025 here. You can find a more complete overview on the Microsoft website. You can also upgrade to Dell PowerEdge servers with Windows Server 2025 or upgrade your compatible machines, a list of which can be found here. Of course, Dell and Microsoft teams are working together on next-generation solutions for your data centres. I invite you to stay tuned for our next announcements!