В таблице SysUserLog добавить поле osAccountName и изменить метод insert.
X++:
public void insert()
{
xSession xSession = new xSession();
this.computername = xSession.clientComputerName();
this.clientType = xSession.clientKind();
this.sessionId = xSession.sessionId();
this.buildNum = xInfo::buildNo();
// UserName -->
this.osAccountName = WinApi::getUserName();
// UserName <--
this.overwriteSystemfields(true);
this.(fieldNum(SysUserlog, createdDate)) = xSession.loginDate();
this.(fieldNum(SysUserlog, createdTime)) = xSession.loginTime();
super();
}