You cannot reach a Non-Meraki VPN network (3rd party application) from a Meraki AutoVPN tunnel (Branch site) Only local subnets on the MX that has the Non-Meraki VPN tunnel can reach it. (The AnyConnect subnet should work) If you need access from branches to 3rd party application you need to build a Non-Meraki VPN tunnel from each branch and from vMX to the provider ... View more

"Customers are only required to accept terms and conditions of use on the Meraki dashboard after purchasing an AnyConnect license in order to apply it on the MX. There is no linkage of AnyConnect licenses or Smart Accounts to the Meraki Dashboard or MX Appliance." AnyConnect Licensing on the MX Appliance - Cisco Meraki There is no need to link it to the Meraki appliance or dashboard. You simply need to have the licenses purchased and in your smart account in order to abide by the licensing agreement. ... View more

I don't think you'll be able to change that.   What I would do is export the current MAC usernames to a CSV file.  "Search and replace" them in something in Excel.  And then bulk import them using methods like this: https://activedirectorypro.com/create-bulk-users-active-directory/ ... View more