Axept Webcall is a division of Swisscom, the largest telecommunications company in Switzerland. It provides engineering and operation services and specializes in Microsoft unified communications and collaboration solutions. Axept Webcall recently deployed Microsoft Exchange Server 2013 on-premises to provide updated messaging capabilities to its employees. As a result, it improved its high availability configuration and enhanced communications. To run Exchange Server 2013 in a virtualized environment, Axept Webcall uses a Network-Attached Storage (NAS) solution. It is able to use low-cost drives in the NAS due to the 50 percent IOPS (I/O operations per second) reduction from Exchange Server 2010.