Veeam ONE Report Error "Invalid query string"

Note to Veeam Backup for Microsoft 365 Customers If you were directed here by the output of the Test-VBORepository cmdlet, please visit https://www.veeam.com/kb4704. The typo in the cmdlet output will be corrected in a future release. Challenge When previewing a report in Veeam ONE Web Client, th...

How to log in to the Linux Helper Appliance

Purpose This article documents how to login to the Linux appliance used by Veeam Backup & Replication. This is not a common need, but may be neccesary for troubleshooting or advanced configuration. Linux appliances are used by Veeam Backup & Replication for several purposes: In Surebackup, the...

Windows 11 24H2/25H2 | Server 2025 - Recovery Media Restore Fails with: The Local Security Authority cannot be contacted

Issue Resolved in September 8 2026 Windows Updates The underlying issue documented in this article was resolved by Microsoft in the September 8 2026 security updates for Windows 11 KB5124008 and Windows Server 2025 KB5122871. After applying the update, the Veeam Recovery Media must be recreated...

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...

Veeam Management Pack v6 Required Ports and Permissions

Solution Required Permissions Connection to Virtual Servers VI Object | Required Permissions ---|--- vCenter, ESXi Host | Read-Only1 Host.CIM.CIM Interaction2 Datastore.Browse Datastore3 Datastore.Configure Datastore3 Datastore Cluster.Browse Datastore Cluster3 1 Minimum required permission over...

Veeam Software Appliance/Veeam Infrastructure Appliance — Updater Component Vulnerability

Veeam Software Security Commitment Veeam® is committed to ensuring its products protect customers from potential risks. As part of that commitment, we operate a Vulnerability Disclosure Program VDP for all Veeam products and perform extensive internal code audits. When a vulnerability is...

How to Test Port Connectivity

Purpose This article documents how to test connectivity between two machines over a specific port. Product Service Ports Most connection errors involving ports in the 61xx, 93xx, 94xx, and 10xxx ranges are related to Veeam product services. Determine whether the port in the connection error is...

Antivirus Exclusions for Veeam Agent for Mac

Purpose This article documents antivirus exclusions that may be created to reduce the impact that antivirus software has on the functionality of Veeam Agent for Mac. Note: Antivirus will not always cause Veeam Agent for Mac functions to fail; antivirus software may also negatively impact backup...

How to Limit Parallel Disk Processing in Veeam Agent for Microsoft Windows

Purpose This article documents how to disable or limit parallel disk processing in Veeam Agent for Microsoft Windows. Solution The following registry values can used to control parallel disk processing on the machine where Veeam Agent for Microsoft Windows is installed: To disable parallel disk...

‘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 Prevent Veeam Reverse Proxy Service From Locking Port 80

Purpose The Veeam Reverse Proxy Service, a component of Veeam Backup & Replication, binds to port 80 by default in order to redirect HTTP requests to HTTPS on port 443. This article explains how to disable HTTPS redirection so that the service listens only on port 443, allowing port 80 to be clos...

Vulnerability Scanner Detection Related to CVE-2023-38545

Veeam Backup & Replication 12.1.2 Release - Article Update With the release of Veeam Backup & Replication 12.1.2, the VDDK libraries, which contained the libcurl library, are no longer included with the Veeam Transport package. After upgrading, the Veeam Transport Package on remote components wil...

Veeam PowerShell cmdlets to help Automate Backup Copy Backup Format Upgrade

This article provides information about using Veeam PowerShell to automate the procedure of upgrading Legacy Periodic Backup Copy jobs to use the new True Per-Machine backup format. These PowerShell commands can be used to simplify the Backup Chain Format upgrade process...

List of Security Fixes and Improvements in Veeam Backup & Replication

Purpose This article describes all security-related fixes and improvements introduced in each release or update of Veeam Backup & Replication. The goal of this article is to provide our customers' security and compliance teams with detailed information on security improvements between releases, i...

Guest processing fails for Nutanix AHV, Proxmox VE, Scale Computing HyperCore

Challenge When running backup or replication jobs for Windows virtual machines hosted on Nutanix AHV, Proxmox VE, or Scale Computing HyperCore with Veeam Backup & Replication 13.0.1 Patch 2, guest processing fails with one of the following errors: Failed to install guest processing components for...

Minimum supported OS version for Veeam VSS Hardware Provider is Microsoft Server 2012 (64-bit only).

Challenge An attempt to rescan, upgrade, or update the Veeam Backup Server fails with the error: Minimum supported OS version for Veeam VSS Hardware Provider is Microsoft Server 2012 64-bit only. Cause This issue occurs because an entry in the Configuration Database causes the Veeam Backup &...

How-to Restore Lost Access to Cache Database After Using Custom SSL Certificate

Article Applicability This article is relevant only if the Veeam ONE deployment uses a custom SSL certificate, and not the one generated by the Veeam ONE installer. The error shown in the challenge section can also occur if the Veeam ONE Caching Service cannot access the PostgreSQL instance that...

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...

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...

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...

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...

Build Numbers and Versions of Veeam Plug-In for oVirt KVM

This KB article lists all versions of the Veeam Plug-In for oVirt KVM and their respective appliance build numbers. Starting with Veeam Backup & Replication 12.3, the Release Notes for Veeam Plug-In for oVirt KVM , are included in the Veeam Backup & Replication Release Notes. Note: Prior to versi...

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 &...

How to Perform a Manual Failback (Reverse Replication)

Article Applicability This article is relevant only to non-CDP snapshot-based replicas. Reverse replication cannot be used to fail back a CDP replica. To fail back a CDP replica, use the built-in failback workflow described in Failover and Failback for CDP. Purpose This article describes how to...

SQL Plugin Job Fails with Error: "Mandatory arguments not set" or "Starting retention policy task"

Challenge After the upgrade or installation of the patch for Veeam Backup & Replication 12.3.2.4165, existing Veeam Plug-In for Microsoft SQL jobs fail with the following error: Failed to backup database. Error: Mandatory arguments not set Session failed: Mandatory arguments not set. Starting...

How to Upgrade the NATS Server Used by Veeam Backup for Microsoft 365

Purpose This article provides information about upgrading the NATS Server used by Veeam Backup for Microsoft 365. NATS Server Version Impact It is recommended that customers use the latest supported version of NATS Server with Veeam Backup for Microsoft 365 to avoid any potential performance...

Converting Disk from RAW to QCOW2 to Allow For Incremental Backup

Purpose This article documents how to convert a Disk from RAW to QCOW2, allowing Veeam Backup for Oracle Linux Virtualization Manager and Red Hat Virtualization to create an incremental backup of the disk. As documented in the Veeam Backup for Oracle Linux Virtualization Manager and Red Hat...

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...

vCenter Server or ESXi Host Becomes Unavailable After Its TLS Certificate Is Replaced

Challenge A VMware vSphere server becomes unavailable in Veeam Backup & Replication after the TLS certificate installed on that server has been replaced or renewed. Jobs and other operations that require a connection to that server fail while the server is unavailable. Cause This issue occurs...

dkms 3.1.3-1 Causes Backup to Fail With “Veeam snapshot kernel module not found”

Article Applicability This article is specifically regarding RPM-based Linux distros i.e., Oracle, Fedora, and Tumbleweed that have dkms 3.1.3 installed: root@localhost rpm -qa | grep dkms dkms-3.1.3 -1.el9.noarch Challenge Veeam Agent for Linux backup job fails with the following errors when dkm...

RPC function call failed. The RPC server is unavailable. w/ Application-Aware Processing

Challenge A Backup or Replication job utilizing Application-Aware Processing fails with the error: RPC error:The RPC server is unavailable. Code: 1722 Cause Possible causes include, organized from most common to rarest: The ports that Veeam Backup & Replication is attempting to use are blocked by...

Veeam ONE Database Calculator for Veeam Backup for Microsoft 365 Monitoring

New Interactive Calculator An updated interactive calculator is now available to replace the legacy Excel file included with this article. Veeam ONE Calculator Solution Summary This Veeam ONE database sizing calculator will help estimate the database size required to retain historical data when...

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...

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...

Release Notes for Veeam Backup & Replication 9.5 Update 4b

More Recent Version Available Please find the latest version of Veeam Backup & Replication here: Veeam Downloads - Latest Version Challenge Release Notes for Veeam Backup & Replication 9.5 Update 4b Cause Please confirm that you are running version 9.0 Update 2 build 9.0.0.1715 or later prior to...

Veeam ONE: SQL Express Maximum Database Size Limitation

Challenge When the Veeam ONE database is located in a SQL Express instance, if the database reaches the maximum allowed size, Veeam ONE will not be able to continue data collection, thus affecting data accuracy and alarm generation. Cause If you choose to host the Veeam ONE database on Microsoft...

Veeam Agent for Linux: Update Blocked by Repository Signing Key Change

Article Applicability This article is intended for customers managing Veeam Agent for Linux 6.3 deployments. Deployments that have already been updated to Veeam Agent for Linux 13, or are being updated to it, are not affected by the repository GPG key change. Challenge When attempting to update...

Veeam Service Provider Console Vulnerability ( CVE-2024-29212 )

Patch Reissue - 2024-05-28 On May 28th, 2024, Veeam issued an enhanced update to address this critical vulnerability in Veeam Service Provider Console VSPC. Although our initial patch, issued on May 7th, effectively addressed the primary concern, a subsequent review identified an area for further...

Veeam Guest Catalog Service does not start after upgrade

Challenge After a consecutive upgrade of Veeam Backup & Replication and Enterprise Manager to a newer version, VeeamCatalogSvc fails to start if the EM database is located on a remote server. Cause The account that is used to start VeeamCatalogSVC might not have access to the Veeam Enterprise...

Option to Install Veeam ONE Agent is Unavailable (Greyed Out)

Challenge When attempting to install the Veeam ONE Agent on a Veeam Backup Server, theInstall agent option is unavailable and greyed out. Cause There are several possible causes for this issue: The Veeam ONE Agent is already installed on the Veeam Backup & Replication Server. The Veeam ONE Server...

Failed to perform post-processing for plug-in. Error: The issuer certificate does not have a Basic Constraints extension.

Challenge After upgrading a Windows-based Veeam Backup & Replication deployment to version 13.0.1 or higher, the following error may occur: Failed to perform post-processing for plug-in $pluginName Linux $machine Error: The issuer certificate does not have a Basic Constraints extension. Examples:...

"Established connection failed because connected host has failed to respond :10005"

Challenge A Windows Agent Backup or Windows Agent Policy type job within Veeam Backup & Replication fails with either of the following errors. A Veeam Agent Backup operating in Managed by backup server fails with the error: Error: Managed session has failed: A connection attempt failed because th...

Microsoft SQL Server Transaction Log are not truncated due to an error code 0x80004005 [TLS 1.0]

Challenge When backing up a machine running a Microsoft SQL server where TLS 1.0 has been disabled, a job may fail with the error code 0x80004005 TLS 1.0. The following warning will be found on the server that is being protected by either Veeam Backup & Replication or Veeam Agent for Microsoft...

Granular sudo Permissions for Management of Veeam Agent for Linux Deployments

More Secure Alternative Starting in Veeam Backup & Replication v12.1, it is now possible to deploy Veeam Agent for Linux using pre-installed Veeam Deployer Service and add that machine to a Protection Group using certificate-based authentication instead of credentials. Using this method, no...

Call execution timeout (100000 ms) (Veeam.Backup.SSH.PerlSoapException)

Article Applicability This article discusses an issue that only occurs when non-persistent Veeam Data Movers are used. The non-persistent data movers are only used when the account provided to Veeam Backup & Replication to connect to a Linux server does not have root or root-equivalent permission...

How to assign ProPartner Portal Roles

Purpose This article documents how to assign internal VCSP employees a Pulse user role to allow them access to the VCSP Pulse portal within the Veeam ProPartner setup. Note: Roles can only be assigned by the employee of the ProPartner holding the ProPartner manager role. Solution To adjust the...

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...

Public Folder Backup Hangs

Challenge An Exchange backup job that contains a public folder mailbox runs in an endless cycle, continuously getting changed items from one of the public folders. In the job logs, you can see multiple entries in the following format: Changed items: 0, deleted items: 0, read state changes: 100...

How to Update Location Profile Endpoint Details and Preserve Access to an Existing Kopia Storage Repository

Purpose This article documents the correct procedure to update the Endpoint details in the Location Profile for an existing Kopia storage repository in S3-compatible stores and ensure the existing associated repositories remain accessible. Customers may wish to update the Endpoint details e.g.,...

Unable to Interact with Some Hypervisors and Cloud Platforms

Veeam Backup & Replication 13.0.1 Upgrade Warning During the upgrade to Veeam Backup & Replication 13.0.1 or higher, the following warning may be displayed: Incompatible backup server certificate The certificate does not support child certificates creation and must be replaced for virtualization...