Thanks again, paulwood (IS/IT--Manageme),
But, Yes everything is enabled and configured,
Sorry, fogot to mention - BackOffice2000 server was upgraded
from SBS4.5 and the same MsOutlook on the same W2000Pro station was working wthout any glitches.
Now funny thing is that another PC with W98 OS has no problem to access E-Mail within its MSOutlook throu the same BckOff2000 Server