The last time and date that an attempt to log on to this account was made with a password that is not valid. This value is stored as a large integer that represents the number of 100-nanosecond intervals since January 1, 1601 (UTC). A value of zero means that the last time a incorrect password was used is unknown.
The high part of this large integer corresponds to the dwHighDateTime member of the FILETIME structure and the low part corresponds to the dwLowDateTime member of the FILETIME structure.
This attribute is not replicated and is maintained separately on each domain controller in the domain. To get an accurate value for the user's last bad password time in the domain, each domain controller in the domain must be queried. The largest value that is obtained represents the true bad password time.
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