Hi @lscharf
I would suggest to review this community post regarding a similar issue. It states that:
Looks like all I needed was to switch to ldaps, and set ENABLE_ACTIVE_DIRECTORY_UNICODE_PASSWORD (as well as ENABLE_WRITE_BACK) to true. I can now use Auth0 password reset to change passwords on AWS Managed Active Directory. Yay!
Let me know if that helps or not!
Kind Regards,
Nik