Disable ESXi 6 password policy (bypass "password based on a dictionnary word" message)

Hi all,

I am looking at a solution for my issue with ESXi 6 password :
I want to change a root password and I got this error message :
"weak password: based on a dictionary word and not a passphrase. Try again"

This is for one of my customers and I did not manage to get the way to disable security policy for this particular message.
I found how to change the characters number and type needed, but not how to completly disable this policy or force my new password.
Of course my customer need this password and not another one...
His password contains "Log", maybe this is the "dictionnary word" identified by the system.

Any help will be gladly welcome here, thx in advance.