Microsoft Exchange Server Enterprise CAL - Licence & software assurance - 1 user CAL - Open Value Subscription - additional product, annual fee, with services - Win - All Languages

The Exchange Server Enterprise CAL provides access to Unified Messaging and advanced compliance, as well as Forefront Security for Exchange Server and Exchange Hosted Filtering for onsite and hosted antivirus and anti-spam protection.

• Exchange Server offers built-in protective technologies to keep your business moving, reduce spam and viruses, enable confidential communications, and help your company to be compliant
• With Exchange Server, employees get anywhere access to their e-mail, voice mail, calendars, and contacts from a variety of clients and devices
• Exchange Server enables new levels of operational efficiency through capabilities that optimize hardware and networking investments and features that help make administrators more productive

The Exchange Server Enterprise CAL provides access to Unified Messaging and advanced compliance, as well as Forefront Security for Exchange Server and Exchange Hosted Filtering for onsite and hosted antivirus and anti-spam protection.