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    Cloud Backup:Grant the Cloud Backup client the permissions to read data from an SMB file system in NAS

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    Cloud Backup:Grant the Cloud Backup client the permissions to read data from an SMB file system in NAS

    Last Updated:Mar 11, 2026

    Because the Cloud Backup client lacks permission to read data from SMB file systems on NAS, Cloud Backup cannot back up data. To resolve this, you must grant the Cloud Backup client read permission for SMB file systems on NAS. This topic explains how to grant the Cloud Backup client this permission on Windows.

    Prerequisites

    You have installed the Cloud Backup client.

    Background information

    We recommend granting Cloud Backup permission to access the SMB NAS file system through the Windows service on a Windows system in the following scenarios:

    • The account used to install the backup client does not have permissions to access the SMB file system because Active Directory (AD) permission control is implemented on the file system.

    • The local system account used to install the HBR client does not have permissions to access the SMB file system.

    Procedure

    Perform the following steps to grant the Cloud Backup client permissions to read files.

    1. You can connect to an ECS instance or log on to a local server.

    2. Use the composite key Win+R to open the Run tool. Then, enter services.msc and click OK.

    3. Locate Alibaba Cloud Backup Service in Services. Right-click it and select Properties.

    4. In the dialog box, select the Log On tab.

    5. Select This Account. Then, browse to enter your username and password. Click OK.

      The account must have the following permissions:

      • Full access to the NAS file system.

      • Administrative rights.

      • Permissions to log on as a service.

      For more information, see How do I configure a logon identity for an on-premises Cloud Backup client?

    6. Restart the Alibaba Cloud Backup Service.