[ActiveDir] locked out

[SandyWu]

All gurus,

Wonder if any of you have experienced this before.

Suddently over the weekend, all domain accounts ( i mean all ) are locked
out except the domain admin accounts. What could have caused this problem
?  The only  clue that I had is this is the week to change the  summer
time back but we had this done every year, had never had this issue
before. Could this be a worm of some sort of virus. Looking into our
security log it did not show me nything out of norm ( faild security ,
locked out has been turned on)

Any suggestions will be appreciated.


Regards,


Sandy