This standard user client access license (CAL) authorizes one user to access Office Communications Server or Live Communications Server from any device (for example, when an employee accesses the server from a computer at work and another at home).
- This standard CAL supports the instant message and presence capabilities of Office Communications Server 2007. For conferencing and voice and call management, an enterprise CAL is required.
- Live Communications Server 2005 does not have separate standard and enterprise CALs; only the one license is needed.
For web conferencing, voice over IP, and application sharing capabilities, an enterprise user CAL is required. Enterprise CALs are additive and must be used in conjunction with standard CALs.
Device CALs and an external connector (EC) license are also available. A device CAL authorizes one computer to access Office Communications Server, regardless of the number of users (for example, on a shared workstation). The EC license allows any number of external users or devices to access a single installation of either the 2005 or 2007 version of Communications Server.
Note: This license does not require media. Instructions for obtaining the license will be sent to your organisation email address after your eligibility has been verified and your administrative fee has been received.
- Under the Software Assurance program, customers acquire the right to install any new release of products covered in the agreement during the term of their coverage.


