Event Details
Operating System->Microsoft Windows->Built-in logs->Windows 2000-2003->Security Log->Logon/Logoff->EventID 683 - Session disconnected from winstation
EventID 683 - Session disconnected from winstation
A user disconnected from another computer without logging off. The connection was either a terminal server session or a remote administration session. This message is logged for informational purposes only.

Find more information about this event on ultimatewindowssecurity.com.

Corresponding events on other OS versions:

Windows 2008

 Sample:
Event Type:	Success Audit
Event Source:	Security
Event Category:	Logon/Logoff 
Event ID:	683
Date:		06.12.2010
Time:		11:43:50
User:		NT AUTHORITY\SYSTEM
Computer:	                     DC1
Description:
Session disconnected from winstation:
 	User Name:	                     CBrown
 	Domain:		RESEARCH
 	Logon ID:		(0x0,0x5AE818)
 	Session Name:	RDP-Tcp#3
 	Client Name:	                      DCCC1
 	Client Address:	10.30.34.58
Log Type: Windows Event Log
 Uniquely Identified By:
Log Name: Security
Filtering Field Equals to Value
OSVersion Windows 2000
Windows XP
Windows 2003
Source Security
Category Logon/Logoff
EventId 683
Field Matching
FieldDescriptionStored inSample Value
DateTime Date/Time of event origination in GMT format. DateTime 10.10.2000 19:00:00
Source Name of an Application or System Service originating the event. Source Security
Type Warning, Information, Error, Success, Failure, etc. Type Success
User Domain\Account name of user/service/computer initiating event. User RESEARCH\Alebovsky
Computer Name of server workstation where event was logged. Computer DC1
EventID Numerical ID of event. Unique within one Event Source. EventId 576
Description The entire unparsed event message. Description Special privileges assigned to new logon.
Log Name The name of the event log (e.g. Application, Security, System, etc.) LogName Security
Category A name for a subclass of events within the same Event Source. Category Logon/Logoff
Domain Domain of the account for which logon is requested. InsertionString2 RESEARCH
User Name User Name identify the user of the remote desktop connection that was disconnected to. InsertionString1 CBrown
Logon ID ID of the logon session of the logged on user. Useful for tracking other user activity within the same logon session. InsertionString3 (0x0,0x5AE818)
Session Name The name of the session. InsertionString4 RDP-Tcp#3
Client Name Client Name specifies the computer name of the client computer. InsertionString5 DCCC1
Client Address Client Address specifies IP address of the client computer. InsertionString6 10.30.34.58
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