Microsoft’s Windows Server 2012 R2 Essentials :

Microsoft Windows Server Essentials R2 2012 allows for up to 25 users or 50 devices on one server with greatly improved data protection capabilities. This version of the software is designed to give you the flexibility to choose which applications and services run on-site and which are cloud-based.

With secure Remote Web Access allows you and your team members to work from anywhere with an internet connection.

• Group Policy Efficiency: Improve startup times for offline machines with the “Policy Cache” setting, storing and using group policy settings locally on domain-joined devices.

  Client System Restore: Windows Deployment Services (WDS) now supports full Client System Restore.

• Automated Data Prioritization: Storage Spaces automatically prioritizes fast media for frequently accessed files.
• Precise IP Management: IP Address Management (IPAM) offers granular user access control for DHCP configurations, seamlessly integrating with System Center Virtual Machine Manager 2012 R2.
• Faster VM Deployment: Generation 2 VMs no longer need the Legacy Network Adapter, and the SCSI controller offers superior performance.