I have a few dumb devices (Gemtec IoT LoraWAN gateways) on one network that rely on NTP to function correctly. After they were installed, they worked for about 1 day then stopped relaying sensor info ...

I noticed that our Domain controller is off by approximately 5 minutes the other day. Apparently a known "issue" in the environment for some time, when I raised it with my Manager as a potential issue ...