Skype for Business Server 2015 – Hardware/Software Requirements

Hardware recommended for servers

Skype for Business Server supports the same hardware as Lync Server 2013

Hardware Component Recommended
CPU 64-bit dual processor, hex-core, 2.26 gigahertz (GHz) or higher.Intel Itanium processors are not supported for Skype for Business Server server roles.
Memory 32 GB
Disk 8 or more 10,000 RPM hard disk drives with at least 72 GB free disk space.-Two of the disks should use RAID 1, and six should use RAID 10.OR-Solid state drives (SSDs) which provide performance similar to 8 10,000-RPM mechanical disk drives.
Network 1 dual-port network adapter, 1 Gbps or faster (2 recommended, which requires teaming with a single MAC address and single IP address).

Operating System Support

Standard/Enterprise Edition or Datacenter Edition can use any of the following:

  • Windows Server 2008 R2 SP1 or latest service pack
  • Windows Server 2012
  • Windows Server 2012 R2

Note: Unlike the predecessors of the Lync family, the underlying Operating System will be playing a key role for Skype for Business Server 2015. This is due to the underlying architecture of the Lync High Availability in an Enterprise environment is based on Windows Fabric component, which is part of the Windows Server Operating System.

Operating System Default Windows Fabric version
Windows Server 2012 R2 Windows Fabric v3
Windows Server 2012 Windows Fabric v3
Windows Server 2008 R2* Windows Fabric v3
Windows Server vNext

*You should only be using Windows Server 2008 R2 when you have existing servers with Lync Server 2013 already installed, and you’re intending to do an in-place upgrade of them.

Therefore, Recommended Operating System: Windows Server 2012 R2

Additional software requirements


  • Lync Server 2013 CU5+ or latest hotfix if Upgrading from Lync Server 2013
  • Powershell v 6.2.9200.0 or later
  • SQL Server 2012 SP1 for Enterprise Edition
  • Following Operating System hotfixes
    • Windows Server 2008 R2  – KB2633623
    • Windows Server 2012 – KB2858668
    • Windows Server 2012 R2 – KB2982006

Standard Edition server database

  • Microsoft SQL Express 2014 (bundled in the FE server(s))

Back-end database of a Front End pool, Archiving database, Monitoring database, persistent chat database, and persistent chat compliance database

  • Microsoft SQL Server 2008 R2
  • Microsoft SQL Server 2012
  • Microsoft SQL Server 2014

Database High Availability Support

  • SQL Mirroring
  • SQL Clustering
  • SQL Always On Availability Groups*
  • Synchronous Writes to Back End*

*New features

Please note that the above information is provided “AS IS” with no warranties, and confers no rights. The content may be changed as and when the finalized information is been publically announced by Microsoft.