if we have 1 site with Meraki MX in it, and the requirements is to connect this site to 2 different organizations that has Meraki SD-WAN appliances (ERP application in one organization, IP telephony in the other)
how can this be achieved using 1 Meraki MX onsite?
If however you are looking to run AutoVPN, a limitation of AutoVPN is that it happens inside of an Organization.
What is the relationship between yourselves and the other organizations? Is there a potential to bring all the equipment into a single organization but separate Networks? You could divide up Meraki Admins to only have access to specific Networks.
I suspect you will need Site to Site with Different Organizations, but let us know if there is more to it.