Veeam Error: Cannot upload guest agent’s files to the admin share

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There are a variety of factors that could cause this error to occur during a backup job. Some of the more common factors are: 

  • Disk Space: Insufficient free space on the target machine may prevent the upload of the guest agent’s files. Ensure there is adequate free space available.
  • Firewall and Security Settings: Ensure that firewalls or security software on the Veeam Backup & Replication server or the target machine does not block access to the administrative share. Verify that the necessary ports for file sharing are open and accessible.
  • Verify Access to the Admin Share: Ensure the administrative share (admin$) is accessible from the Veeam Backup & Replication server to the target machine. You can manually check this by accessing the admin share using the same credentials Veeam uses for the backup task.
  • Check Credentials: Verify the credentials configured in Veeam Backup & Replication for accessing the administrative share on the target machine. Ensure that the provided username and password have sufficient permissions for access.
  • Check and Restart Services: Rebooting Veeam services or those related to file sharing on both the Veeam Backup & Replication server and the target machine can often resolve file upload issues. Restart these services and retry the backup job.

If you continue to receive this error, would like assistance resolving it, or have other questions related to your backups, please reach out to

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