By default, log files are written to a location on the system volume (e.g. C:\ProgramData\Veeam).
| Default locations: | |
|---|---|
| *%ProgramData%\Veeam\Backup365\Logs | A separate log file for each component is created in this folder. | 
| %ProgramData%\Veeam\Backup365\Logs | Restore Portal | 
| %ProgramData%\Veeam\Backup365\Logs\Organization_Name\Job_Name | Backup and Backup Copy Jobs | 
| %ProgramData%\Veeam\Backup365\Logs\Organization_Name | Data Retrieval jobs | 
| %ProgramData%\Veeam\Backup\Veeam_Explorer_Name\Logs | Veeam Explorers | 
| %ProgramData%\Veeam\Backup365\Logs\PowerShell | PowerShell | 
| %ProgramData%\Veeam\Backup365\Logs\Move | PowerShell Move-VBOEntityData cmdlet | 
| %ProgramData%\Veeam\Backup365\Logs\Remove | PowerShell Remove-VBOEntityData cmdlet | 
Source: User Guide.