When you try to download a Horizon FLEX virtual machine, you receive a warning message that states the security certificate is invalid.

You receive the message Invalid Security Certificate when you try to download a Horizon FLEX virtual machine.

This warning message appears when the Horizon FLEX server uses a self-signed certificate and your computer does not trust the certificate.

Verify with your Horizon FLEX administrator that the certificate is valid for the Horizon FLEX server. If the certificate is valid, select the Always trust this host with this certificate check box and click Connect Anyway.