Netbotz user information changes require a reboot if user info is also used for SNMP version 3 credentials.

User names and passwords are also used when configuring version 3 SNMP credentials. If the credentials are changed, they will not take effect until the Netbotz appliance is rebooted.

This is a known issue and for version 3 Netbotz devices and is fixed in Botzware 3.2.

Version 2 Netbotz must be rebooted and there is no fix scheduled.