Event ID - 4634

Event Id4634
SourceMicrosoft-Windows-Security-Auditing
DescriptionAn account was logged off.

Subject:
      Security ID:<Security ID>
      Account Name:<Account Name>
      Account Domain:<Domain Name>
      Logon ID:<Logon ID>     

Logon Type:<LogonType>     
Event InformationCause :
This event is generated when a logon session is destroyed. It may be positively correlated with a logon event using the Logon ID value. Logon IDs are only unique between reboots on the same computer.
Resolution :
THis is an information event and no user action is required.
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