[Samba] Time sync issue

[miguel medalha]

> Setting the registry value does not solve the basic problem, however. If 
> the value is set to zero, the time sync is without signature.

I'm not sure about that...

Using type NT5DS, with the registry key set to 0, communication from the DCs
to clients now contains lines like this:

Key id: 2651062272
Authentication: d3a98613645ce42afeb5bb8701397952

Which didn't happen before, type NT5DS didn't work at all. What is happening
here, then?