Hi Tilo,
trifft das vielleicht bei Euch zu ???
SYMPTOMS
Out-of-Office (OOF) reply messages are not sent when all Exchange 2000 Client Access Licenses (CALs) are used.
CAUSE
This problem occurs in the License Logging service. When the total program user count equals the total server license count, Exchange 2000 cannot send OOF messages. For example, if you have five licenses for Exchange 2000 and you have used all five licenses, Exchange 2000 does not send OOF messages.
Hier der Link, http://support.microsoft.com/d…aspx?scid=kb;en-us;811912
wenn nicht, beantworte mir noch folgende Frage trifft das bei definitiv allen Usern zu oder nur bei einzelnen. - welche Outlook Version
Gruss
Frank