UCS Mailinglists not shown in OX

Hi,
any idea how to make mailinglists we create in Univention show up in OX Adressbook as well?
We have found this
https://www.oxpedia.org/wiki/index.php?title=OXAE_MailingLists_with_contacts-ldap
But as this is way too old to rely on, i thought that maybe someone here has a better idea.

cheers
Sascha

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