Hi Bepi,
It is strange that you need to supply krb5.ini file to make it work at least we've tried to make Toad for Apache Hadoop work without dependency on OS Kerberos configuration. Let's focus on your question now. I think it should be possilbe to customize this location with a property you've mentioned java.security.krb5.conf.
You may try to customize kerberos configuration location property by following steps:
- Open a installation folder of Toad for Apache Hadoop (usually located at C:\Program Files\Dell\Toad for Apache Hadoop)
- Edit configuration file toad4hadoop.ini and append a new line with following text: -Djava.security.krb5.conf=<PATH to your krb5.ini>
- Save it and try to launch application
BR,
Jiri