For the last 2 months all my domain accounts locked out 3
times, included 1 time today.
I got 2 domain controllers in single active directory
tree, and they are both configured as Global catalogs and
Also the an old NT4 domain running exchange 5.5 which is
not yet migrate to exchange 2000.
the old (NT 4) and new (windows 2000) are set up 2 ways
trust to one another.