FYI, it's Cisco's recommended best practice to synchronize the FTD to a NTP server. If you're running Firepower Management Center you can generally just set it there and tell the FTDs to use FMC as their source and all is right in the world. Speaking...

I also had this problem and the directions in the Cisco documentation here (https://www.cisco.com/c/en/us/support/docs/security/anyconnect-secure-mobility-client/215935-configure-asa-anyconnect-vpn-with-micros.html_) are part of the problem. Everythi...

This is mainly for anyone who stumbles upon this now since it was never answered. I had this issue recently and after verifying "http server enable" was set, "Encryption-3DES-AES" was Enabled (show version) and I had access available from the subnet ...