Authentik default ldap with python-ldap3 (for radicale)

[BastelBaus]

Dear community,

I try to get Authentik's ldap server runnign with radicle which is using python.ldap3 (which claimes RFC compatibility).
I get errors "createTimestamp" not a valid attribut (and modifyTimestamp then as well). Both are at least named in RFC4512 and RFC4527 but not in the Authentik standard attrributes (link). I did also not succeed adding such attributes to the Authentik users [1] (at least they do not show up in my ldapsearch test query.

Any hints how to solve ?

BR, BastelBaus

[1]