Hello,
hopefully this ist the right place for this Topic. I just looked to the german version to the online help to MS Outlook command line switches:
https://support.office.com/de-de/article/befehlszeilenoptionen-f%C3%BCr-microsoft-office-produkte-07...
Unfortunately "/cleanclientrules" and "/cleanserverrules" are translated that Server based rules will be deleted.
Possibly someone can take care to it.
Sincerely