License. Client Access License (CAL). Language version: English. 5 license(s). 64-bit computing. Minimum storage drive space: 32 GB. Minimum RAM: 0.512 GB. Minimum processor speed: 1.4 GHz. Microsoft Windows Server 2025 prepares you for tomorrow while delivering the security, performance, and flexibility you need today. Be more productive with easier networking, faster storage, and hybrid cloud capabilities that adapt to your needs. Get ahead of what’s next with forward-looking security, and AI-ready compute. Some key improvements include:. Hybrid: Adapt quickly across hybrid, cloud and edge. Easier to connect to Azure Arc to bridge on-premises and cloud-based servers. Deliver Azure capabilities to your on-premises servers. Security: Hardware and software-level security to deter cyberattacks; next-generation Active Directory that improves security and scalability. Enable a tailored security baseline and configure drift protection from the start. Modern, future-ready platform: Windows Server 2025 is now easier to upgrade and scale, with better-than-ever app compatibility.