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Event ID: 1394 Source: NTDSGeneral

Source
Level
Description
Updates to the Directory Service database are succeeding again, so the NetLogon service has been restarted.
Comments
 
This event can be ignored if it occurred when Windows was started in Active Directory Restore mode or some other form of Safe Mode. Otherwise, investigate further.
This is a notification of service restoration after a period of failed writes to ntds.dit (which would have previously disabled NetLogon). ntds.dit is once again available, so NetLogon service can be restored. If this message is being displayed frequently, there may be a problem with defragmentation or other similar processes working on ntds.dit, or the server load may simply be too high.

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