For RADIUS two-factor authentication in Horizon View and Access Point, we support the standard RFC 2865 - Remote Authentication Dial In User Service (RADIUS) protocol. This also includes Access-Challenge for any authentication that can be supported by text entry of credentials and challenge text through Horizon Clients. We don't have a list, but check that the vendor supports RFC 2865. Many vendors support this standard. I also know that there are some implementations that interface RADIUS authentication with other authentication systems such as Google Authenticator. Check with the vendors.

Access Point also supports SecurID two-factor authentication and is officially certified by RSA.

For future general questions or follow up on Access Point in general, please post a message on the VMware View discussion page as comments here are specifically for the Access Point PowerShell command. Thanks.