Thanks for the update.
It appears that "Systems Manager without licensing" has been retired, so we'll need to procure some licenses.
As for purchasing licenses, I'm currently unable to locate an option when logged in? Is there a 'buy additional licenses' functionality anywhere? Unless I'm missing something obvious it's surprisingly hard to purchase license to continue using Meraki.
I've attempted to reach out via the contact page and filled in the form under "? > Get Help > still need help > Contact your Systems Meraki Sales Representative," but I haven't received a response yet.
I'll look for alternative solutions in the meantime.
Thanks for your help.