samba - May 2005 - Samba/Winbind accessing AD every 5 minutes ??

Hi,

I have been searching for a reason why my ActiveDirectory event log is
spammed with:

Pre-authentication failed:
      User Name:            linux$
      User ID:              KK\linux$
      Service Name:               krbtgt/KK.LOCAL
      Pre-Authentication Type:  0x0
      Failure Code:               0x19
      Client Address:             1.2.3.4

Unfortunately, no one had an idea. So now I will try to limit the access
from Samba to a minimum.

So why do Samba access the ActiveDirectory exactly every 5 minutes with
the machine accound (machinename$ as above) even though there is no user
activity ?

My winbind cache is set to 15 minute, so it is not cache refresh. What
else could it be and can I change this access time ?

Thanks,
Bjarne Maschoreck