Hey @wick    Devices that end in -M come in Meraki Managed mode by default. You would have to migrate them first to DNA/CLI mode and then configure them as a monitor-only switch separately. Support can assist with Migrating to DNA/CLI mode.   https://documentation.meraki.com/MS/Deployment_Guides/Getting_started%3A_Cisco_Catalyst_9300_Management_with_Meraki_Dashboard#Migrating_to_DNA_or_CLI_managed_mode ... View more