With IPHost Network Monitor you can run simple snmp requests against a Cisco device in your network.
cdmsNumActiveDmmUsers
Cisco Digital Media Management System Number Active Dmm Users
1.3.6.1.4.1.9.9.655.1.7.2
The number of users who are logged into DMS administrative appliance.
Back to CISCO-DIGITAL-MEDIA-SYSTEMS-MIB. MIB page.
IPHost Network monitor allows you to monitor cdmsNumActiveDmmUsers on Cisco device via the SNMP protocol. Download IPHost Network Monitor (500 monitors for 30 days, 50 monitors free forever) to start monitoring Cisco wireless switches right now.