Account Lockouts

. I am desperate. This happens to both administrator
accounts and regular user accounts. It even happens to accounts which never
expire.

Ever since we installed win2k server on our local server we have been experiencing
account lockouts. One users account will lockout every day for a week or
two and then that user will be fine and another user will begin to
experience the problem. These lockouts do not occur at login time, the user
will be working along for several hours and suddenly not be abel to access
the network (I check and their account has been locked out). Some of the
servers on our network are still NT but most are now 2000. Some of our
workstations are Win98 and some are XP.