Azure Data Explorer credentials are set in the commit process environment and never reach the telegraf service.
Location
src/conf_mode/service_monitoring_telegraf.py:104-106
data/templates/telegraf/override.conf.j2
Problem
os.environ[...] in get_config(); the systemd override clears EnvironmentFile= and only sets INFLUX_TOKEN.
Impact
Azure Data Explorer output can never authenticate.
Suggested fix
Write AZURE_* to a 0600 EnvironmentFile referenced by the override.