In NetOps->Admin->NFA the SNMP Refresh button is grayed out in version 20.2.7.
When viewing Devices in the NFA Managing Monitoring section, when selecting a Device some have the SNMP Refresh button available. Many do not where the same button is grayed out and not available for selection.
Note the example where where the SNMP Refresh button is not available:
The devices without that button available do not have an SNMP Profile set.
All supported DX NetOps Performance Management and Network Flow Analysis releases
To resolve this select a device and select the Edit button.
Set an SNMP Profile and Save the change.
The SNMP Refresh button now becomes available for that device.