With IPHost Network Monitor you can run simple snmp requests against a Cisco device in your network.
ciscoUnityLicPoolingIsEnabled
cisco Unity Lic Pooling Is Enabled
1.3.6.1.4.1.9.9.385.1.2.17
This indicates whether or not license pooling is enabled for this server.
Back to CISCO-UNITY-MIB MIB page.
IPHost Network monitor allows you to monitor ciscoUnityLicPoolingIsEnabled on Cisco device via the SNMP protocol. Download IPHost Network Monitor (500 monitors for 30 days, 50 monitors free forever) to start monitoring Cisco routers right now.