Systemd-timesyncd FallbackNTP never used

I use systemd-timesyncd to run NTP time synchronization. I want to specify two servers, one company internal (not available from outside), and one from the public internet: [Time] NTP=ntp.mycompany.net FallbackNTP=pool.ntp.org However, if the device is outside the company network and the internal server is not available, timesyncd never switches over to the FallbackNTP. user@device:~# timedatectl timesync-status Server: n/a (ntp.mycompany.net) Poll interval: 0 (min: 32s; max 34min 8s) Packet count: 0 What am I overlooking here? Thanks!