Licensing of Cisco Security Manager 4.2

For these two reasons, I believe most enterprises should start from "Standard-25" (Standard version 25 devices) or better versions:

1. Standard-to-Professional upgrade license can only be applied on "Standard-25".
2. 90-day Evaluation License: this is for Professional version only.

Reference:
Installation Guide for Cisco Security Manager 4.2 - Licensing� [Cisco Security Manager] - Cisco Systems