Bad Hyper-V Username Logon Attempt

Challenge Veeam ONE raises the following event-based alarm:Bad Hyper-V username logon attempt. Cause The Bad Host Username Logon alert suggests that someone is attempting to access the host with an invalid username or password. Solution Veeam ONE raises the Bad Hyper-V username logon attempt alar...

How to Manually Back Up Veeam Configuration Databases

Purpose This article documents methods to back up Microsoft SQL and PostgreSQL databases. This article also documents how to locate the configuration database for Veeam Backup & Replication / Veeam Cloud Connect Enterprise Manager Veeam Service Provider Console. For information about Veeam ONE,...

REST API Error: S3 Error: The difference between the request time and the current time is too large / Invalid Credentials for Amazon S3

Challenge This article covers two different errors that occur when performing different tasks, but have the same root cause: When adding S3 Object Storage to Veeam Console, Veeam displays the follow error: Failed to list S3 buckets: check if the specified account has required permissions REST API...

Veeam Agent Standalone Backup Fails with "Version string portion was too short or too long"

Challenge After upgrading Veeam Backup & Replication to version 12, the following tasks for Standalone Veeam Agent i.e., Veeam Agent for Microsoft Windows, Veeam Agent for Linux, Veeam Agent for IBM AIX, and Veeam Agent for Oracle Solaris deployments that existed before the upgrade may fail...

Restore or Failback to Server 2022 Hyper-V host fails with "Unable to update VM security descriptor Error"

Article Applicability This article is specific to an error that occurs when attempting to restore or failback to a Hyper-V host running Windows Server 2022 or versions 2004 and 20H2 of the Semi-Annual Channel versions of Windows Server. This article addresses an issue that is mentioned in the Vee...

Troubleshooting vPower NFS Datastore Mounting Issues

Challenge During SureBackup, Instant Recovery, Instant Disk Recovery, or Other-OS FLR operation, the following error is seen in the VMware environment: Error during the configuration of the host: NFS Error: Unable to Mount filesystem: Unable to connect to NFS server. or An error occurred during...

How to Change Initial Management Port for Veeam Plug-ins for Enterprise Applications

Purpose This article documents how to change the default port used by the Plugin Manager 6791 for Veeam Plug-ins for Enterprise Applications: Veeam Plug-in for SAP HANA Veeam Plug-in for Oracle RMAN Veeam Plug-in for SAP on Oracle Veeam Plug-in for Microsoft SQL Server Veeam Plug-in for IBM Db2...

How to Reset Worker Root Password

Purpose This article documents how to set or reset the password for the root account on a Veeam Worker appliance. The Worker is a Rocky Linux-based virtual machine deployed as a backup infrastructure component by the following Veeam Plug-ins: Veeam Plug-in for Nutanix AHV Veeam Plug-in for Proxmo...

Replication Error: The name '{vmname}' already exists.

Challenge Veeam Backup & Replication replication job fails with the following error message: Processing Error: The name 'replica' already exists. When the error above occurs within Veeam Backup & Replication the following correlating event can be found within the vSphere Events. Cause This error...

How to Add Exclusions to Veeam Threat Hunter Scan

Purpose This article documents how to exclude files from the Veeam Threat Hunter scan. Solution To exclude specific files or folders from Veeam Threat Hunter scans, add a registry entry on your Veeam Backup Server: Registry Path: HKLM\SOFTWARE\Veeam\Veeam Threat Hunter\ Value Name:...

Veeam Service Provider Console fails to connect to restored VSPC database due to collation conflict

Challenge When attempting to connect Veeam Service Provider Console to an existing VSPC database the following error occurs: Implicit conversion of varchar value to varchar cannot be performed because the collation of the value is unresolved due to a collation conflict between "" and "" in add...

How to Reset Account Lockout for 'Managed Hardened Repository ISO by Veeam'

Purpose This article documents how to unlock the accounts used with the Managed Hardened Repository ISO by Veeam, veeamsvc or vhradmin, when they become locked out. The Managed Hardened Repository ISO by Veeam deploys Rocky Linux with the DISA STIG security profile, which utilizes faillock to loc...

How to Adjust the Veeam Service Provider Console Web UI Session Timeout

Purpose This article documents how to modify the Veeam Service Provider Console configuration to adjust the Web UI timeout. The default Web UI timeout is 1 hour, and tokens are good for up to 48 hours. Solution Tip: Use the copy button in the text blocks below to simplify specifying which file to...

‘The revision level is unknown’ upon Guest OS File restore

Challenge When attempting to restore files from a backup of a server that was running Windows 2016 or 2019 and had Deduplication enabled for some or all of the drives, the restore fails with the following error: Failed to restore "" Error: Failed to read xx bytes from the file...

How to Change the Settings Related to Veeam Backup & Replication Log Files

Purpose This article documents how to change settings regarding where log files are stored, how large an individual log file may become, and how many generations of log files are retained. Solution Log Files Stored on the Veeam Backup Server The following registry values must be created on the...

Email item data export from EWS failed

Challenge Exchange Online backup jobs in Veeam Backup for Microsoft 365 and Veeam Data Cloud for Microsoft 365 may fail to process mailboxes, returning one of the following errors: Processing mailbox failed with error: Email item data export from EWS failed item IDs: .... The operation has timed...

Veeam Backup for Microsoft 365 server license type is not compatible with Veeam ONE license type.

Challenge When attempting to add Veeam Backup for Microsoft 365 to Veeam ONE, the connection fails with: Failed to connect to "". Veeam Backup for Microsoft 365 server license type is not compatible with Veeam One license type. Cause As documented in the Veeam Backup for Microsoft 365 7 Release...

Potential Issue With Backing up Sharepoint, Onedrive, Teams Files, and List Attachments

Challenge Backup of SharePoint, OneDrive, and Teams data completes successfully, and subsequent restores of this protected data are successful. However, when opening some of the restored files or list attachments, users may find that these items do not open correctly in their associated...

Vulnerabilities Resolved in Veeam Backup & Replication 12.3

All vulnerabilities documented in this article were resolved in Veeam Backup & Replication 12.3. Veeam Product Latest Version Download Page Veeam Software Security Commitment Veeam® is committed to ensuring its products protect customers from potential risks. As part of that commitment, we operat...

Release Information for Huawei Plug-In for Veeam Backup & Replication

Huawei Plug-In - End of Life The Huawei Plug-In for Veeam Backup & Replication reached End-of-Life on 2022-04-22 and is no longer available. Requirements Before installing Huawei Plug-In v1.0.23, ensure that you are running Veeam Backup & Replication 10.0.0.4461 or later. To check the version, op...

Veeam repository update fails, GPG key error

Challenge When attempting to update the Veeam Agent for Linux or the veeam-release repository package, an error is encountered: GPG key signature on key http://repository.veeam.com/keys/RPM-GPG-KEY-VeeamSoftwareRepo.asc does not match CA Key for repo: veeam or The following signatures were invali...

SharePoint or OneDrive Backup fails with 'Cannot complete this action'

Issue Recurrence - July 20, 2026 Veeam Technical Support is tracking several recent cases where the issue reported in this article is occurring. This recurrence is under investigation, and this notice will be updated as further information becomes available. Update - July 27, 2026 To remediate th...

Veeam Agent for Microsoft Windows 6.3.2.1302 Private Fix Deployment Information

Article Applicability This article documents the Veeam Agent for Microsoft Windows private fix deployment procedure for customers who have recently installed Veeam Backup & Replication 12.3.2.4165 Patch. That patch to Veeam Backup & Replication includes a private fix for Veeam Agent for Microsoft...

CVE-2022-26500 | CVE-2022-26501

Challenge Multiple vulnerabilities CVE-2022-26500, CVE-2022-26501 in Veeam Backup & Replication allow executing malicious code remotely without authentication. This may lead to gaining control over the target system. Severity : Critical CVSS v3 score : 9.8 Cause The Veeam Distribution Service TCP...

Release Information for Dell PowerStore Plug-In for Veeam Backup & Replication

This plug-in leverages the Veeam Universal Storage API, which enables storage OEMs to allow Veeam Backup & Replication integration to the arrays for backup and replication jobs. Requirements Before installing Dell PowerStore Plug-In v2.1.9, ensure that you are running Veeam Backup & Replication...

How to Use VSSTrace to Collect VSS Diagnostic Logging

Challenge This article explains how to collect additional VSS diagnostic data with the VSSTrace tool, a Microsoft Windows Software Development Kit SDK component. Cause Veeam products use Microsoft Volume Shadow Copy Service VSS for various tasks. Sometimes it is necessary to go through the...

Release Information for Veeam Backup & Replication 12 Cumulative Patches

This update was superseded by Veeam Backup & Replication 12.3. Release Information Below are details about the Cumulative Patches that have been released for Veeam Backup & Replication 12. Each subsequent Cumulative Patch also includes all fixes present in the previous Cumulative Patches. P202307...

Log4j Vulnerability (CVE-2021-44228)

General Vulnerability Details CVE-2021-44228 https://nvd.nist.gov/vuln/detail/CVE-2021-44228 https://vulners.com/cve/CVE-2021-44228 Impact on Veeam Software Veeam products are not affected by this vulnerability. Apache Log4j is not in use by any Veeam products. More Information Veeam Blog: Log4j...

Veeam Agent – Windows recovery image file not found

This article includes steps that advise executing commands using Diskpart, which has no confirmation system to prevent mistakes. Failure to understand how to use Diskpart or typos may cause issues. Please take your time and double-check each command is correct for your environment before executin...

Meltdown and Spectre vulnerabilities

Challenge Veeam is aware of the side-channel analysis vulnerabilities known as Meltdown CVE-2017-5754 and Spectre CVE-2017-5753, CVE-2017-5715 affecting most of the modern processors. Cause For more information regarding these vulnerabilities please visit security advisories posted by Intel...

Release History for Veeam Service Provider Console 9

Veeam Service Provider Console 9 Builds 9.3.0.35057 2026-07-29 Release Information Release Notes What's New 9.2.1.33875 2026-05-27 Resolved Issues Security CVE-2026-32998 | Severity: Critical 9.4 A vulnerability in Veeam Service Provider Console allows for remote code execution. CVE-2026-64635 |...

Granular sudo Permissions for Veeam Plug-in for Proxmox VE

Purpose This article provides an example granular 'sudoers' configuration for the Linux account that will be used by Veeam Backup & Replication when managing a Proxmox VE host. Solution Critical Details Before You Begin Review all Considerations and Limitations in the user guide! Most noteworthy:...

Veeam Security Bulletin (September 2024)

All vulnerabilities documented in this article are resolved in the latest version of each product. Veeam Product Latest Version Download Page Veeam Software Security Commitment Veeam® is committed to ensuring its products protect customers from potential risks. As part of that commitment, we...

How to Investigate 'Encrypted Data Event' from Malware Detection

Version Requirement This tool only works for malware inline detection events created by Veeam Backup & Replication 12.1.2 and newer. Previous versions of Veeam Backup & Replication are not supported. Protected Workload Guest OS Requirement This tool only supports investigating Windows-based...

How to Configure Advanced Syslog Integration Options

Purpose This article documents advanced configuration options for syslog integration with Veeam Backup & Replication, a new feature starting in version 12.1. Solution The following advanced configuration options are available: Add BOM Before MSG Field Add the Unicode byte order mask BOM before th...

How to Add RHEL 8/9 Using NIST 800-171 or DISA STIG Security Profile to Veeam Backup & Replication

Product Enhancement Starting in Veeam Backup & Replication 12.1.2, both DISA STIG and NIST profiles are now natively supported without any need to perform the manual tasks documented in this article. Purpose This article documents the additional procedures required to add a Linux machine to Veeam...

Restored Linux Machine Fails to Boot

Challenge An issue with initiramfs may cause the restored Linux machine to fail to boot with the following symptoms: ForRHEL/CentOS/SUSE systems, during the boot process, they will drop into the dracut emergency shell and display errors similar to: dracut-initqueue timeout - starting timeout...

Failed to get guest OS path for newly attached disk there are 2 new disks with uuid

Challenge A backup job using a Linux-based VMware Backup Proxy fails with the error: Failed to get guest OS path for newly attached disk /.vmdk: there are 2 new disks with uuid Cause This error occurs when the Linux-based VMware Backup Proxy processing the virtual machine has multipath enabled...

The remote server returned an error: (401) Unauthorized for Microsoft Loop SharePoint sites

Challenge The Backup of a SharePoint site displays the following error message: Failed to initialize site processing: /contentstorage /CSP, error: The remote server returned an error: 401 Unauthorized. The URL of SharePoint sites created by Microsoft Loop sites can be identified by the...

The HTTP request was forbidden with client authentication scheme

July 2, 2026 -- Issue Recurrence Resolved July 2, 2026 | Veeam Customer Technical Support began observing an increase in cases reporting that jobs were failing with the same error documented in this article. July 3, 2026 | Microsoft engineering has implemented backend changes as part of the ongoi...

Veeam Backup & Replication 13: Changes to Supported Linux Platforms

Article Applicability This article lists the specific Linux distributions and versions that will no longer be supported starting with Veeam Backup & Replication and Veeam Agent for Linux version 13. These lists are intended for customers currently running Veeam Backup & Replication 12.3 and Veeam...

Release Information for Veeam Backup & Replication 12.1 and Updates

This update was superseded by Veeam Backup & Replication 12.3. Release Information 12.1.2.172 2024-05-21 Security Vulnerabilities Indicated severity values are CVSS 3.1 scores. Veeam Backup Enterprise Manager VBEM CVE-2024-29849 | Severity: Critical 9.8 This vulnerability in VBEM allows an...

Warning: "User does not have a valid Microsoft 365 license with SharePoint plan enabled."

Microsoft OneDrive for Business or Microsoft SharePoint backups may not be backed up, resulting in a warning: User does not have a valid Microsoft 365 license with SharePoint plan enabled...

How to reinstall vSphere Web Client plug-in for Veeam Backup & Replication

Article Applicability This article is regarding the Local vSphere Client Plug-in only. Veeam Backup Enterprise Manager offers the following configurations of the vSphere Client plug-in: Local vSphere Client Plug-in -- For vSphere Client 7.0.0.x or earlier, the plug-in is installed locally on the...

Veeam vPower NFS Service fails to start

Challenge This article documents troubleshooting steps to be taken if the Veeam vPower NFS Service fails to start. Solution Check Port Usage Check if another process is locking one of ports used by the Veeam vPower NFS Service: 1. Open an Administrative PowerShell Prompt 2. Run the following...

Veeam Service Fails to Start with Error 1920

Challenge A service relating to Veeam Backup & Replication fails to start and displays the message: Error 1920. Service failed to start. Verify that you have sufficient privileges to start system services. Copy Solution Common Causes The service is set to run as an account other than Local System...

How to Review Password Requirements of Veeam Software Appliance

Purpose This article documents how to review the specific password requirements for a Veeam Software Appliance. Solution The Veeam Software Appliance adopts the DISA STIG password requirement standard. These password requirements may change between releases and as part of OS updates. View Current...

Granular sudo Permissions for Management of Hardened Repository

Purpose This article documents the granular sudo permissions required to allow Veeam Backup & Replication to deploy and manage a Hardened Repository. Solution Account Requirements The Linux user account used by Veeam Backup & Replication to deploy and manage the Hardened Repository must use the...

Build Numbers and Versions of Veeam Agent for Linux

This KB article lists all versions of Veeam Agent for Linux and their respective build numbers. For more information on downloading the latest version of Veeam Agent for Linux , visit: Veeam Agent for Linux -- Current Version Download Page Veeam Agent for Linux -- What's New Latest Version Versio...

How to Disable Oracle Processing Without Disabling Application-Aware Processing

Purpose This article documents how to disable the processing of Oracle instances by Application-Aware Processing without disabling Application-Aware Processing processing for other applications running on the same machine. Solution Disable Oracle Processing for a VM Protected by Veeam Backup &...