OTRS 6 import, some user passwords not working

Confirmed, I looked into the database.

OLDer (between 2007 and June 2012) passwords in OTRS are saved in plaintext

This means that in Zammd only the newer accounts with a hash instead of the plaintext password will work after import.

Solutions:

1. Make users change their password before migrating from OTRS to Zammad.
2. Let users use the recover password functionality in Zammad after the migration