W2K3 R2 SP2 - KDC certificate error

[Cyrrus 10]

guten morgen zusammen.

 

mein server Win 2003 R2 SP2 zeigt im event log folgenden Fehler

 

Source: KDC

Event ID: 20

 

The currently selected KDC certificate was once valid, but now is invalid and no suitable replacement was found.

Smartcard logon may not function correctly if this problem is not remedied.

Have the system administrator check on the state of the domain's public key infrastructure.

The chain status is in the error data.

 

habe etliche loesungsansaetze gefunden, aber keiner hilft!

jemand ne idee?

 

danke euch!