Hi @tantony , With AD authentication, you will point to one of your DCs for authentication purposes. As long as there is an AD account, the user will be able to connect to the VPN. (Active Directory Integration) With RADIUS, you will point to a RADIUS server for authentication, which allows you to provide a bit more security. You can setup a policy so that only people belonging to a certain AD group (which RADIUS will be pointed to) will be able to connect to VPN. (Configuring RADIUS Authentication with Client VPN) As far as 2FA is concerned, you can use RSA and DUO with the built-in Windows client, although it is limited to the Push or Biometric authentication methods as there is no way to input a code at this time. If you are using Meraki Cloud authentication, you can create multiple accounts for users to use with the VPN. (Managing User Accounts using Meraki Authentication)They do not have to have dashboard access in order to be setup as a VPN user. You should absolutely have individual accounts for each user accessing VPN.
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