we configured timestamper as follows:

<?xml version='1.0' encoding='UTF-8'?>
<hudson.plugins.timestamper.TimestamperConfig plugin="timestamper@1.10">
    <timestampFormat>'<b>'HH:mm:ss'</b> '</timestampFormat>
    <elapsedTimeFormat>'<b>'HH:mm:ss.S'</b> '</elapsedTimeFormat>
    <allPipelines>true</allPipelines>
</hudson.plugins.timestamper.TimestamperConfig>

Checking the Manage Jenkins > Configure System > Timestamper page we found that "Enabled for all Pipeline builds" was not set, however "System clock time format" aka timeStampFormat and "Elapsed time format" aka elapsedTimeFormat to be correctly populated. We manage a lot of Jenkinses, so going into each one of them and manually setting the flag in the web UI is not an option.

What can be done here?