Hi Spike,
thanks a lot for your findings ! I appreciate your effort.
I also played around with the TRUSTED_FOR_DELEGATION flag on the machine account, and yes
it looks like the behaviour is consistent.
( I had a case where I got a TGT without the TRUSTED_FOR_DELEGATION flag set on the
machine account,
but I'm not sure if sssd and sshd where restarted correctly.. )
So, that should be it... I now have to get to the Active Directory department on my
corporate environment
and ask them to set the flag for me, because it seems that only Administrator can set the
flag ( if not customized ),
even if you ( a non-Administrator account owns the machine account...).
Thanks everybody for all the help provided !
Have a nice day !