One or more bad blocks were detected and skipped

Challenge Veeam Agent for Microsoft Windows VAW displays the following warning during the backup: One or more bad blocks were detected and skipped. Copy Cause There are two scenarios under which this warning may occur: 1. The disk of the machine being backed up has bad clusters, as recorded by th...

Antivirus Exclusions for Veeam Backup & Replication

Veeam Threat Hunter service Exclusions When upgrading to Veeam Backup & Replication 12.3, the installer's Configuration Check will display a warning advising: The new Veeam Threat Hunter service scanning process might be interrupted by existing antivirus software on mount hosts. Please read KB199...

Veeam Kubernetes Service Fails to Start - Error 1064

Article Applicability The service start 'Error 1064' can occur for other reasons, and this article documents an issue that only happened with the Kasten K10 plug-in versions before 12.0.1.4. Review the cause section carefully to identify if this article is related. Challenge When the short date...

Veeam Backup & Replication support for vSphere

Purpose This article provides information about compatibility between vSphere and Veeam Backup & Replication. Solution The vSphere versions listed in this article include all applicable patches for those versions. vCenter Server versions and build numbers Build numbers and versions of VMware...

SureBackup of VM with NLB fails with "IP addresses were not resolved" or "cannot detect IP address"

Challenge A SureBackup job processing a VM that is configured to use Microsoft NLB in Unicast mode fails with the error: Cannot detect IP address. Ping test will be skipped Copy IP addresses were not resolved Copy Solution Review the NLB configuration with your network administrator team to...

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...

"Mailbox is not fully configured" Error During Exchange Backup

Challenge A backup job may fail when processing Archive Mailbox objects with the following error: Processing archive mailbox: [email protected] failed with error: Mailbox is not fully configured. Solution This issue was resolved in Veeam Backup for Microsoft 365 8.2 P20251031 build...

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...

How to Collect Logs for Veeam Agent for Microsoft Windows

Purpose This article explains how to collect the logs required for a Veeam Agent for Microsoft Windows support case. Solution Quick Start Automated Veeam Agent for Microsoft Windows Log Collection If the Windows machines where Veeam Agent for Microsoft Windows is installed has an internet...

Upgrading the SQL Database Engine Software (Microsoft SQL Server or PostgreSQL) Used by Veeam Backup & Replication

Support Scope This article is provided as a courtesy to give customers a high-level explanation of how to upgrade the underlying SQL database engine used to host the Veeam Backup & Replication configuration database. Per the Veeam Customer Support Policy, section 10: Support for Veeam Configurati...

"Incompatible Package Type" When Installing License in Veeam Backup & Replication

Challenge When attempting to install a Veeam Universal License in Veeam Backup & Replication the following error occurs: License sections have incompatible Package types Cause Starting with Veeam Backup & Replication 10, a feature was added to allow users to install a socket-based license and an...

Installing Veeam Data Mover service Error: scp: error: unexpected filename:

Challenge When adding a Linux server to Veeam Backup & Replication, the New Linux Server wizard displays the error: Installing Veeam Data Mover service Error: scp: error: unexpected filename: Copy Log Example C:\ProgramData\Veeam\Backup\Utils\Util.InfraItemSaver.log Info Uploading file to...

Change Managed Server Name/FQDN/IP in Veeam Backup & Replication

Usage Exceptions The method documented in this article is only to be used for changing the Name/FQDN/IP of a managed server--specifically, those servers listed under the Managed Servers node of the Backup Infrastructure view. Please be mindful of the following usage exceptions. DO NOT USE THIS...

Cannot restore to the backup repository host when storage VSP is enabled

Article Applicability Starting in Veeam Backup & Replication 12.1, this error will no longer occur due to internal coding changes. Challenge A Hyper-V Instant Recovery or SureBackup Job fails with the error message: Cannot restore to the backup repository host when storage VSP is enabled. Cause T...

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...

SureBackup for VM With VBS Enabled Fails With “Invalid change tracker error code”

Challenge A SureBackup job testing a VMware VM that has Virtualization-Based Security VBS enabled fails with the error: An error occurred while taking a snapshot: Invalid change tracker error code. An error occurred while taking a snapshot: Invalid change tracker error code. Cause This error occu...

Vulnerabilities Resolved in Veeam Backup & Replication 13.0.2

All vulnerabilities documented in this article were resolved in Veeam Backup & Replication 13.0.2.29. 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 V...

KB2903: vSphere 5.5/6.0 VM Backup fails with "Exception of type 'Veeam.Backup.AgentProvider.AgentClosedException' was thrown"

Challenge When backing up a VM within an environment running vSphere 5.5 or vSphere 6.0 the job fails with: Exception of type 'Veeam.Backup.AgentProvider.AgentClosedException' was thrown Copy Version Requirement The error listed above has many causes. Directly interpreted, it means that a process...

Backups to Data Domain fails with “the user has insufficient access rights. Err: 5075”

Challenge Backup or Backup Copy jobs targeting a Dell EMC Data Domain repository fail with the following error: Error: Failed to call RPC function 'DDBoostFcIsExist': Failed to connect to storage. Storage: , User: . the user has insufficient access rights. Err: 5075. Rescan operations for a Dell...

NATS Server Configuration Advice for Use With Veeam Backup for Microsoft 365

Purpose This article provides advice for optimizing NATS Server configuration when used in conjunction with Veeam Backup for Microsoft 365. Solution When Veeam Backup for Microsoft 365 is deployed using the included NATS Server, the system variable 'GOMEMLIMIT ' is set to 30% of the total system...

CVE-2023-38547 | CVE-2023-38548 | CVE-2023-38549 | CVE-2023-41723

Veeam ONE 12.1 is not affected by the vulnerabilities discussed on this page. Additionally, Veeam Recovery Orchestrator 7 is not affected by these vulnerabilities as it uses Veeam ONE 12.1. Issue Details CVE-2023-38547 A vulnerability in Veeam ONE allows an unauthenticated user to gain informatio...

How to Connect to an Object Storage Repository via Azure Blob Private Endpoints

Purpose This article documents how to configure Veeam Backup & Replication to use Azure Blob Storage Account private endpoints via Azure VPN or Azure ExpressRoute for Scale-Out Backup Repository offload to Capacity Tier or Archive Tier or to connect to an Object Storage Repository in Veeam Backup...

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...

Veeam Backup & Replication console slow or unresponsive

The Veeam Backup & Replication console is slow to respond when switching between different views. The issue is more noticeable when attempting to search through the history of jobs...

How to Reset Worker Root Password

Article Applicability Due to security changes in Veeam Backup & Replication 13.1 to make all workers DISA STIG compliant, the procedure in this article can no longer be used. Please do not follow the instructions in this article for workers included with Veeam Backup & Replication 13.1 or later, ...

Install or Upgrade of Veeam Backup & Replication fails with “Error occurred during certificate processing.”

Challenge When attempting to install or upgrade Veeam Backup & Replication, the "Installing Veeam Backup & Replication Server" step fails with: Error occurred during certificate processing. Cause This error occurs when the RSA private key generation fails during Veeam Backup & Replication...

OneDrive backup job fails with "Download request retry timeout exceeded"

Challenge During a OneDrive backup, the following error may occur while downloading a OneNote file .one: Failed to backup item: %path%, Download request retry timeout exceeded. This error will only be displayed when using one of the following versions of Veeam Backup for Microsoft 365: v7 P202312...

How to use Veeam Live OS ISO

Purpose This article documents utilizing the Veeam Live OS ISO to gain local root access to the Veeam Backup & Replication Veeam Software Appliance when the Host Management Console is unavailable or inaccessible. Solution Downloading Veeam Live OS ISO Download VeeamLIVE ISO Release date: 2026-07-...

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:...

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...

Changed block tracking cannot be enabled: one or more snapshots are present

Challenge After upgrade to Veeam Backup & Replication 10, the Backup of a VM using Cisco HyperFlex Snapshots completes with the warning "Changed block tracking cannot be enabled: one or more snapshots are present" if a Sentinel snapshot is already present. The described issue with Cisco HyperFlex...

Upgrade Fails With “Unable to use database VeeamBackup, because it has an unsupported compatibility level”

Challenge When attempting to upgrade Veeam Backup & Replication software, the following error occurs: Unable to use database VeeamBackup, because it has an unsupported compatibility level SQL Server 2012 or later is required. Cause The database being used for the upgrade is either running on an...

"The remote server returned an error: (403) Forbidden. Access denied" when performing Veeam Backup for Office 365 backup

Challenge Backup and restore operations in Veeam Backup for Microsoft 365 fail with the error: The remote server returned an error: 403 Forbidden. Access denied Impacted Configurations Backup operations for Veeam Backup for Microsoft 365 deployments with Organizations using these authentication...

Failed to install Veeam Analytics Service. Failed to establish connection between the Veeam ONE server and Veeam Analytics service. Operation timed out: 10

Challenge After upgrading Veeam ONE to version 13.0.x, the Veeam Analytics Service installation fails with the following error: Failed to install Veeam Analytics Service. Failed to establish connection between the Veeam ONE server and Veeam Analytics service. Operation timed out: 10. The failure...

Error: Backup proxy is missing C++ runtime components

Article Applicability The error message states that the C++ runtime components are missing, which may be inaccurate. The actual cause of the error is that the VDDK libraries cannot be loaded, which in older versions of Veeam Backup & Replication 9.5 and older was caused by missing C++ runtimes...

Component state mismatch has been detected.

When attempting install or upgrade Veeam Backup & Replication you receive the warning:“ component state mismatch has been detected. Please contact Veeam technical support team directly...

LTO-9 Support Details for Veeam Backup & Replication 11

Challenge When using Veeam Backup & Replication 11 or 11a before P20211211, Tape Backup jobs and other tape-related tasks may fail for up to 15-30 minutes after a new uninitialized LTO-9 tape is loaded into the Tape Drive. Tasks will fail with an error similar to: Failed to inventory tape in Driv...

Build Numbers and Versions of Veeam Backup for Microsoft 365

This KB article lists all versions of Veeam Backup for Microsoft 365 and their respective build numbers. For more information on downloading the latest version of Veeam Backup for Microsoft 365, visit: Veeam Backup for Microsoft 365 -- Current Version Download Page Veeam Backup for Microsoft 365 ...

License Update Fails In Networks Where HTTP Proxy Must Be Used

Challenge License updating may fail if the machine where the Veeam software is installed does not have a direct connection to the Internet and must instead connect to the Internet via an HTTP proxy. For example, when this occurs with Veeam Backup & Replication, the Svc.VeeamBackup.log shows eithe...

Veeam Backup & Replication server does not have Virtual Machine Manager Administrator Console installed.

Challenge When attempting to add Microsoft Hyper-V Servers to Veeam Backup & Replication the following error is displayed: Veeam Backup & Replication server does not have Virtual Machine Manager Administrator Console installed. If you installed VMM Console while Veeam Backup & Replication UI was...

VeeamCDP I/O Filter Installation Fails With “The agent’s workflow is blocked” Error

Challenge When attempting to install the VeeamCDP I/O filter on a cluster that will be used for continuous data protection CDP, the installation fails with the following error: The agent's workflow is blocked until its required solutions are re-mediated externally in vSphere Lifecycle Manager...

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...

High CPU Usage After Upgrade to Veeam Backup for Microsoft 365 6.0

Challenge After upgrading to Veeam Backup for Microsoft 365 6.0, higher than usual CPU usage may be observed during times when no tasks are occurring within Veeam Backup for Microsoft 365. Solution The issue is fixed in Veeam Backup for Microsoft 365 6.0 Cumulative Patch P20220413 6.0.0.379 -...

VSSControl: -2147467259 Backup job failed. Cannot collect writers metadata. VSS asynchronous operation is not completed. Operation: [Gather metadata]. Code: [0x80042318].

Challenge A backup job fails with the following error: VSSControl: -2147467259 Backup job failed. Cannot collect writers metadata. VSS asynchronous operation is not completed. Operation: Gather metadata. Code: 0x80042318. Copy Cause The Volume Shadow Copy service within the machine being backed u...

Cannot find EFI boot manager entry for EFI System Partition

Challenge Backup During the backup of some Linux-based machines, the following error occurs: Cannot find EFI boot manager entry for EFI System Partition GUID Restore During a Bare Metal Restore BMR from a restore point created by a backup that displayed that error, the following error will occur:...

Vulnerabilities Resolved in Veeam Backup & Replication 12.3.2

All vulnerabilities documented in this article were resolved in Veeam Backup & Replication 12.3.2. 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...

"Failed to convert [Not Settable] to UUID."

Challenge Veeam Backup & Replication task interacting with Proxmox VE host fails with: Failed to convert Not Settable to UUID Cause This occurs when the Proxmox VE host has an empty bios UUID, or the reported bios UUID value is unparsable. Solution 1. Remove workers if any from the Veeam Backup &...

CVE-2023-27532

Article Applicability This article documents a vulnerability discovered in a core service of Veeam Backup & Replication and Veeam Cloud Connect. This vulnerability does not affect other Veeam products e.g., Veeam Backup for Microsoft 365, Veeam Agent for Microsoft Windows , Veeam ONE, Veeam Servi...

Windows File Level Restore hangs on "Starting restore session"

Challenge Windows File Level Restore hangs on "Starting restore session" for abnormally long period of time while free disk space on drive C:\ keeps decreasing dramatically on the machine where the Veeam Backup & Replication Console is launched. You may that find the following location of the cac...