Unable to install backup agent: failed to connect to <hostname> Error: Failed to verify [C:\windows\Veeam\Backup\Upload\VeeamDeploymentDll.dll] signature.
Failed to upgrade Installer's DLL.
These errors may occur for any of the following reasons:
Review the following possible solutions that Veeam Support has identified based on support cases:
To more accurately identify the issue, investigate C:\ProgramData\Veeam\Backup\Svc.VeeamInstaller.log from the remote Windows machine where the deployment dll could not be verified:
Log entry examples:
Upgrading DeploymentDll. New library: [C:\Windows\Veeam\Backup\Upload\VeeamDeploymentDll.dll] Verifying [C:\Windows\Veeam\Backup\Upload\VeeamDeploymentDll.dll] signature. Certificate chain Trust status error: CERT_TRUST_REVOCATION_STATUS_UNKNOWN CERT_TRUST_IS_OFFLINE_REVOCATION CERT_TRUST_IS_PARTIAL_CHAIN (0x01010040) Trust status info: (0x00000000) Simple chain #0 Count of elements: 2 Trust status info: (0x00000000) Trust status error: CERT_TRUST_REVOCATION_STATUS_UNKNOWN CERT_TRUST_IS_OFFLINE_REVOCATION CERT_TRUST_IS_PARTIAL_CHAIN (0x01010040) Element #0 Trust status info: CERT_TRUST_HAS_KEY_MATCH_ISSUER CERT_TRUST_HAS_PREFERRED_ISSUER (0x00000102) Trust status error: CERT_TRUST_REVOCATION_STATUS_UNKNOWN CERT_TRUST_IS_OFFLINE_REVOCATION (0x01000040) Extended error: <null> Element #1 Trust status info: CERT_TRUST_HAS_KEY_MATCH_ISSUER (0x00000002) Trust status error: CERT_TRUST_REVOCATION_STATUS_UNKNOWN CERT_TRUST_IS_OFFLINE_REVOCATION (0x01000040) Extended error: <null> Certificate chain Trust status error: CERT_TRUST_REVOCATION_STATUS_UNKNOWN CERT_TRUST_IS_OFFLINE_REVOCATION CERT_TRUST_IS_PARTIAL_CHAIN (0x01010040) Trust status info: (0x00000000) Simple chain #0 Count of elements: 2 Trust status info: (0x00000000) Trust status error: CERT_TRUST_REVOCATION_STATUS_UNKNOWN CERT_TRUST_IS_OFFLINE_REVOCATION CERT_TRUST_IS_PARTIAL_CHAIN (0x01010040) Element #0 Trust status info: CERT_TRUST_HAS_KEY_MATCH_ISSUER CERT_TRUST_HAS_PREFERRED_ISSUER (0x00000102) Trust status error: CERT_TRUST_REVOCATION_STATUS_UNKNOWN CERT_TRUST_IS_OFFLINE_REVOCATION (0x01000040) Extended error: <null> Element #1 Trust status info: CERT_TRUST_HAS_KEY_MATCH_ISSUER (0x00000002) Trust status error: CERT_TRUST_REVOCATION_STATUS_UNKNOWN CERT_TRUST_IS_OFFLINE_REVOCATION (0x01000040) Extended error: <null> CN: [Veeam Software Group GmbH], complete: [0], valid: [1], root CA: [n/a] CN: [Veeam Software Group GmbH], complete: [0], valid: [1], root CA: [n/a] Failed to verify file using the Authenticode provider. Verification status: A certificate chain processed, but terminated in a root certificate which is not trusted by the trust provider. (-2146762487), last error: A certificate chain processed, but terminated in a root certificate which is not trusted by the trust provider. (2148204809) Verifying [C:\Windows\Veeam\Backup\Upload\VeeamDeploymentDll.dll] signature. Failed.
Failed to verify file using the Authenticode provider. Verification status: An error occurred while reading or writing to a file. (-2146885629), last error: An error occurred while reading or writing to a file. (2148081667) Verifying [C:\Windows\Veeam\Backup\Upload\VeeamDeploymentDll.dll] signature. Failed. Upgrading DeploymentDll. New library: [C:\Windows\Veeam\Backup\Upload\VeeamDeploymentDll.dll] Failed. RPC: Upgrading deployment service dll... Failed. ERR |Failed to verify [C:\Windows\Veeam\Backup\Upload\VeeamDeploymentDll.dll] signature >> |--tr:Failed to upgrade VeeamDeploymentDll. Path [C:\Windows\Veeam\Backup\Upload\VeeamDeploymentDll.dll]. >> |An exception was thrown from thread [####].
RPC: Creating file C:\Windows\Veeam\Backup\Upload\VeeamDeploymentDll.dll FC: Creating file. Path: [C:\Windows\Veeam\Backup\Upload\VeeamDeploymentDll.dll]. Desired access: [1073741824]. Creation mode: [0]. FC: Creating file. Path: [C:\Windows\Veeam\Backup\Upload\VeeamDeploymentDll.dll]. Desired access: [1073741824]. Creation mode: [0]. Failed. RPC: Creating file C:\Windows\Veeam\Backup\Upload\VeeamDeploymentDll.dll Failed. ERR |The process cannot access the file because it is being used by another process. >> |--tr:Error code: 0x00000020 >> |--tr:FC: Failed to create file. File path: [C:\Windows\Veeam\Backup\Upload\VeeamDeploymentDll.dll]. Desired access: [1073741824]. Creation disposition: [0]. >> |An exception was thrown from thread [####].
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