Build Numbers and Versions of Veeam Backup & Replication

This KB article lists all versions of Veeam Backup & Replication and their respective build numbers. For more information on downloading the latest version of Veeam Backup & Replication, visit: My Account Portal - Product Downloads Latest Downloads Page Veeam Backup & Replication -- What's New PD...

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...

"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...

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...

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...

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...

How to Manually Update GPG key on Veeam Hardened Repository Appliance

Article Applicability This article is specifically regarding the Veeam Hardened Repository ISO v2 appliance, which was distributed alongside Veeam Backup & Replication 12. For information about manually updating the GPG key on the appliances associated with Veeam Backup & Replication 13, review...

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...

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...

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...

Task pending with "Resource not ready"

Challenge A task within a job in Veeam Backup & Replication is marked as pending with the message: Resource not ready: backup repository Resource not ready: backup proxy Cause These messages are informational and part of the task concurrency control system within Veeam Backup & Replication. Each...

Enterprise Manager: Failed to create website 0x80070020

Challenge Attempting to install/upgrade Veeam Backup Enterprise Manager fails with the following error: Failed to create website 0x80070020 Cause Local antivirus or antimalware software is interfering with the installation process. Solution Disable any local antivirus or antimalware software and...

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...

Release Information for Veeam ONE 13 and Updates

Veeam ONE 13 Releases 13.1.0.7034 2026-07-29 Release Notes What's New Veeam Current Version Download Page 13.0.2.6723 2026-05-27 What's New New Features and Improvements Suspicious Incremental Backup Size Alarm -- Extended Platform Support The Suspicious Incremental Backup Size alarm now covers a...

Veeam One Web Client / Reporter: Access Denied Error

Challenge When attempting to access the Veeam ONE Web Client, formerly known as Veeam ONE Reporter, the following error is shown on the login page: Veeam ONE Web Client Error Access denied Here is what you can do: Go Home Error Variant 1 Error Variant 2 Cause The Internet Information Services IIS...

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...

Release Information for Veeam Backup for Nutanix AHV Plug-In Hotfix (12.6.0.636)

Requirements To upgrade to Veeam Backup for Nutanix AHV 6.1, download the installer below and run it on the Veeam Backup & Replication server that manages the AHV Backup Appliances. The Veeam Backup for Nutanix AHV 6.1 Plug-In must be installed before updating the Nutanix AHV Backup Appliance. Yo...

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 -...

“Object reference not set to an instance of an object” error when initiating SharePoint restore

Challenge On a host with both Veeam Backup for Microsoft 365 and Veeam Backup & Replication installed, SharePoint restore initiated from Veeam Backup & Replication fails with "Object reference not set to an instance of an object" error. Cause This error occurs if the content type of a restored it...

Vulnerabilities Resolved in Veeam ONE 13.1

All vulnerabilities documented in this article were resolved in Veeam ONE 13.1.0.7034. 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 Veea...

"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...

How to Configure Azure Storage Account to Leverage Immutability with Veeam Backup & Replication

Purpose This article was designed to complement the information available in the Veeam Backup & Replication User Guide, specifically the required storage account and container settings to align with the Azure Blob Storage Immutability Limitations. This article describes the correct options that...

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...

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,...

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...

“Invalid Credentials” Error Adding a Hyper-V Host Using a Local Account

Article Applicability This article relates to an error that only occurs when Veeam Backup & Replication is deployed on a Windows machine. With the Veeam Software Appliance, to add a Hyper-V host using credentials, it requires that both the appliance and the Windows machine are added to the same...

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 use "Restore to Amazon EC2" via AWS PrivateLink / Direct Connect

Purpose This article documents how to configure Veeam Backup & Replication to use AWS PrivateLink or AWS Direct Connect to perform Restore to Amazon EC2. This restore configuration also works when the Veeam Backup server has restricted or no public internet access. Region Modification Limitation...

Upgrading/Uninstalling Veeam Backup & Replication fails with "Error 1327. Invalid Drive: [a-z]:\" or "Warning 1327. Invalid Drive [a-z]:\"

Challenge While upgrading or uninstalling Veeam Backup & Replication, the installer stops and displays either of the following messages: Warning 1327. Invalid Drive: F:\ Copy Error 1327. Invalid Drive: F:\ Copy Note: The drive letter in the message may be any drive letter. Cause The settings in t...

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...

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 |...

Powershell: Cannot connect to backup server because some of its components are out of date

Challenge Connect-VBRServer PowerShell cmdlet fails with the error: Connect-VBRServer : Cannot connect to backup server because some of its components are out of date. Cause This issue occurs when the Veeam Backup & Replication Console files on the remote machine where the command was run do not...

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...

Restore to EC2 Error: "Failed to validate machine: Cannot find a suitable image for the restored machine."

Issue Resolved in Veeam Backup & Replication 12.1 The issue documented in this article was resolved starting in Veeam Backup & Replication 12.1. Veeam strongly encourages all customers to update to the latest version. Challenge A Restore to Amazon EC2 fails with the error: Failed to validate...

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...

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...

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 Use Existing Veeam Backup & Replication PostgreSQL instance for Veeam Backup for Microsoft 365 Deployment

Article Applicability This article documents issues that occur when installing Veeam Backup for Microsoft 365 v8 or higher on the same server as an existing Veeam Backup & Replication v12 or higher deployment that is using the included local PostgreSQL instance. The errors described may also occu...

Managed Veeam Agent backup job fails with "Unknown invoker method: 2757" error

A Veeam Agent backup job managed by the backup server fails with the following error: Failed to start backup job Error: Unknown invoker method: 2757...

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...

VDDK Error 3014 - Insufficient permissions in the host operating system

Challenge A Veeam Backup & Replication task interacting with a VMware environment fails with error: Error --tr:VDDK error: 3014 Insufficient permissions in the host operating system. Value: 0x0000000000000bc6 Cause This error occurs when the account used to communicate with the vCenter does not...

Veeam.Archiver.Service terminates due to 'System.OutOfMemoryException' after updating to Veeam Backup for Microsoft 365 7.0.0.3968

Challenge Veeam.Archiver.Service consumes all available virtual memory and then terminates. The issue can be confirmed with the following Windows Events System log: The Veeam Backup for Microsoft 365 Service service terminated unexpectedly. It has done this 1 times. The following corrective actio...

Replication job fails with "Cannot replicate disk because its capacity was reduced"

Challenge After a VM's disks have been resized to be smaller, the Replication job within Veeam Backup & Replication fails with the following error: Processing Error: Cannot replicate disk Datastore vmfolder/vmname.vmdk because its capacity was reduced Copy Cause This error occurs when Veeam Backu...

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...

All Aliases Have Failed

Challenge A Tenant's Backup Job or Backup Copy Job targeting a Cloud Repository fails with the following message: Target gate has rejected connection. Unable to establish target connection. All aliases have failed. The wording of the error might differ, but the root error "All Aliases Have Failed...

"Proxy offline time exceeded” error after updating Veeam Backup for Microsoft 365 to version 4c

Challenge After updating Veeam Backup for Microsoft 365 4c build 4.0.1.531 backups start to fail with the "Proxy offline time exceeded". Cause At the end of every month, Veeam Backup for Microsoft 365 collects licensing information. If your Veeam Backup for Microsoft 365 server is installed on a...

Question mark in Veeam Explorer for Microsoft SQL Server meaning

Challenge In Veeam Explorer for SQL, some databases may be listed with a question mark. Despite the question mark and warning, some restore operations may still function. However, some restore details may not auto-populate due to the lack of metadata. Cause The question mark indicates that metada...

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 Remove Missing Restore Points From Veeam Cloud Connect Backups

Purpose This article documents how to handle a situation in which the tenant of a Cloud Provider needs to forget missing restore points from a backup chain stored in a Cloud Repository. By design, the Forget and Remove operations are not available for restore points in a Cloud Repository. A resto...

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...