Нашел интересную команду PowerShell для объединения логов SharePoint (это удобно когда портал развернуть на ферме) - Merge-SPLogFile. Формат команды
Merge-SPLogFile -Path <String> [-Area <String[]>] [-AssignmentCollection <SPAssignmentCollection>]
[-Category <String[]>] [-ContextFilter <String[]>] [-Correlation <Guid[]>] [-EndTime <DateTime>]
[-EventID <String[]>] [-ExcludeNestedCorrelation <SwitchParameter>]
[-Level <String>] [-Message <String[]>] [-Overwrite <SwitchParameter>]
[-Process <String[]>] [-StartTime <DateTime>] [-ThreadID <UInt32[]>]