For technical documentation, administrators should refer to the AnyConnect 4.x Administrator Guide for legacy configuration or the Secure Client Ordering Guide for current licensing details. x and the new Secure Client (v5.x) features? End-of-life for AnyConnect Client Version 4.x - Cisco
4.7 → 4.8 → 4.10 (direct jump supported if not too old). Check Cisco release notes for platform compatibility (e.g., 4.8 drops Windows 7).