Hypervisor Restore Options are Greyed Out in Context Menu

Challenge When attempting to restore an entire VM, some hypervisor options are greyed out in the right-click context menu. Solution This issue is currently under investigation and is scheduled to be addressed in a future patch. For now, there are two workarounds available: Select the machine to b...

How to Collect Process Dumps and Logs

Article Applicability This article was created to complement KB1727 and provide customers with specific instructions to collect information that will: Help Veam Support identify if the job or task is actually stuck or if it is working on something in the background. Help the Development team...

Tips for DAG Exchange Backup and Replication in vSphere

vSphere Snapshot Improvements This article was initially written when vSphere 5 snapshot operations were known and expected to cause small amounts of I/O stun to a VM's guest OS. Improvements in the latter vSphere versions, including significant changes to snapshot operation methodology in vSpher...

Release Information for Veeam ONE 13.0.1 Patch 1

Veeam ONE 13 Releases 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 all platforms supported in Veeam ONE v13, including Proxmox VE, oVirt KVM Oracle Linu...

Using Veeam Agents with HPE VM Essentials

Article Aplicability This article was created before the release of the Veeam Plug-In for HPE Morpheus VM Essentials. Its content reflects an alternative solution that was available before the direct integration of HPE Morpheus VM Essentials management as a virtual environment in Veeam Backup &...

Veeam Agent for Microsoft Windows Built-In Case Creation fails with "The request was aborted: Could not create SSL/TLS secure channel"

Article Applicability This article is regarding an issue that impacts Veeam Agent for Microsoft Windows build 5.0.0.4301 or older, and was fixed in build 5.0.1.4584. Challenge When attempting to open a support case using the Technical Support button within the Veeam Agent for Microsoft Windows...

Veeam Backup for Google Cloud - Critical Vulnerability (CVE-2022-43549)

Automatic Patching of Components The fix for the vulnerability discussed in this article has been automatically deployed to all Veeam Backup for Google Cloud Backup Appliances that have been configured to have access to repository.veeam.com. Most users will have no additional actions to perform...

Build Numbers and Versions of Veeam Recovery Orchestrator

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

Using Restore to Microsoft Azure with ExpressRoute or site-to-site VPN connectivity to Azure

Challenge You may use Restore to Microsoft Azure for environments with ExpressRoute or site-to-site VPN connectivity to Azure. When using Azure Restore Proxy Appliance and helper appliances to perform the restore, they must have private IP addresses only. Solution Starting with Veeam Backup &...

ConfigStoreRootPath Cluster Parameter Is Not Defined

Challenge This article describes how to fix the warning/error "ConfigStoreRootPath cluster parameter is not defined" appearing in the following situations: When attempting to add a Windows Server 2016 and later Hyper-V cluster to the Veeam Backup & Replication Console. When attempting to backup a...

Backup Copy "Source backup file has different block size."

Challenge The issue described in this KB Article only occurs when a Backup Copy job is using the Periodic copy pruning mode. During consecutive Backup Copy intervals, the same machine or group of machines fails to be processed. The message "Initial copy did not complete, and will resume on the ne...

Appliance Mode (Hotadd) Requirements and Troubleshooting

Requirements Virtual Appliance HOTADD Requirements and Limitations Requirements for Backup and Restore of Encrypted VMs Known Issues If the VM disk resides on a vVol, the Veeam VMware Backup Proxy's VM configuration file vmx must be on the same vVol. The Veeam VMware Backup Proxy VM must be locat...

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...

List of Security Fixes and Improvements in Veeam ONE

Purpose This article describes all security-related fixes and improvements introduced in each release or update of Veeam ONE. This article aims to provide our customers' security and compliance teams with detailed information on security improvements between releases to help them make an informed...

Content-MD5 HTTP header is required for Put Object requests with Object Lock parameters

Challenge Jobs targeting an S3-Compatible repository fail with either of the following errors: Error: S3 error: Content-MD5 HTTP header is required for Put Object requests with Object Lock parameters Code: InvalidRequest Agent failed to process method S3 error: Checksum Type mismatch occurred,...

PostgreSQL and PgBouncer Sizing and Configuration Guide

Challenge Jobs or tasks in Veeam Backup for Microsoft 365 fail with the error: Error: EFCoreLogging: An error occurred using the connection to database 'cache2331ace3-eff1-4ebb-b328-0cb948b2f5c5' on server 'tcp://vb365.domain.tld:6432'. Cause These connection errors can occur in larger environmen...

Granular sudo Permissions for Management of Veeam Agent for IBM AIX

Purpose This article provides examples of granular 'sudo' configuration for the Linux account that will be used by Veeam Backup & Replication when managing Veeam Agent for IBM AIX deployments with a Protection Group. Solution The following tested granular sudo permissions are available: Veeam...

How to Configure the Azure Restore Proxy Appliance Size

Purpose This article documents how to override the default Azure Restore Proxy Appliance size. Challenge Attempting to restore a Linux workload fails to Microsoft Azure when using a proxy appliance size that is not available for subscriptions that have VM size limitations. The following error may...

Antivirus Exclusions for Veeam Plug-ins for Enterprise Applications

Purpose To ensure the performance and reliability of Veeam Plug-ins for Enterprise Applications, we strongly advise implementing the antivirus exclusions outlined in this article. Interference caused by security software will not always cause Veeam Plug-ins for Enterprise Applications to fail; so...

Build Numbers and Versions of Veeam Agent for Oracle Solaris

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

"Internal Server Error" in the Veeam ONE Web Client after upgrade to version 11a

Challenge When attempting to open the reports in the Veeam ONE Web Client, the following error message pops up and the Infrastructure objects are not listed in the reports scope: Solution Option 1: Upgrade to Veeam ONE 12 or higher This issue is fixed in Veeam ONE 12 and higher, to upgrade downlo...

How to enable "Restore to Azure" Generation 2 VM Support

Feature Change in Veeam Backup & Replication 12.1 and higher Starting in Veeam Backup & Replication 12.1, the setting AzureEnableGeneration2VMRestore is now hard-coded to true. This change enables the restore to Microsoft Azure to generate Generation 2 VMsby default. Purpose This article document...

Veeam Cloud Connect jobs fail with "Authentication failed because the remote party has closed the transport stream" error

Challenge After upgrade of Veeam Backup & Replication on the Veeam Cloud Connect service provider's backup server to version 10, tenant jobs may start failing with the following error: "Authentication failed because the remote party has closed the transport stream ". At the same time, the...

VDDK Error 3 Troubleshooting

Challenge A Backup or Replication job fails with an error containing 'VDDK error: 3 ' This most often occurs when forcing aVMware Backup Proxy to use 'Virtual Appliance' transport mode and disabling the 'Failover to network mode' option. Cause The most common scenario is that the disks of the VM...

The dependency service or group failed to start

Challenge Cause This error is usually caused by one or more Windows VSS services being disabled. To fix it, you will need to go to Start Run, and enter "services.msc" without quotes. Here, you will see a list of services, their description, and whether or not they are running. Make sure RPC servi...

How to Change Veeam Service Provider Console UI Language

Veeam Service Provider Console 9.1 Integrated Feature Starting with Veeam Service Provider Console 9.1, the ability to assign and customize the Portal Language is now an integrated feature able to be configured via the Web UI: Veeam Service Provider Console 9.1 - Configuring Portal Language Artic...

How to use SQL Management Studio to Apply SQL-Based Hotfixes to the Veeam ONE Database

Purpose This article documents applying a SQL query script-based hotfix for the Veeam One database. Solution Identify the Location of the Veeam ONE Database If Veeam ONE is installed, open the Veeam ONE Settings Utility to view the current SQL Server settings. C:\Program Files\Common...

How to manually collect recovery media logs for Veeam Agent for Linux

Challenge You cannot collect recovery media logs for Veeam Agent for Linux from the repository. In such a case, you can still manually collect recovery media logs from the Linux machine where the bare-metal restore is performed. Cause If the bare-metal restore is not completed, the recovery media...

How to Create Secure IAM Policy for Connection to S3 Object Storage

KB ID: | 3151 ---|--- Product: | Veeam Backup & Replication Published: | 2020-04-21 Last Modified: | 2026-08-10 Get weekly article updates SUBSCRIBE By subscribing, you are agreeing to have your personal information managed in accordance with the terms of Veeam's Privacy Notice. Cheers for trusti...

How to Migrate Backup Data Between Repositories for Veeam Backup for Microsoft 365

Purpose This article provides information regarding migrating backup data between JET-based backup repositories and from a JET-based backup repository to a non-immutable object storage repository when using Veeam Backup for Microsoft 365. This article documents how to migrate backup data between...

Unable to exclude files from snapshot: Shadow Copy Optimization Writer timed out

Challenge A Veeam Agent for Microsoft Windows backup job configured to operate in file-level backup mode with an entire volume selected and individual folders excluded, may fail with the error shown below. Unable to exclude files from snapshot: Shadow Copy Optimization Writer timed out. Cause The...

Release Notes for Veeam ONE 8.0 Update 2

Challenge Release Notes for Veeam ONE 8.0 Update 2. Cause Please confirm you are running Veeam ONE 8 prior to installing this update. You can check this under Help | About in Veeam ONE Monitor Client, the build number should be 8.0.0.xxx. After upgrading, your version build will be 8.0.0.1669. Th...

Hyperlinks in SSRS-based reports do not work

Challenge Some hyperlinks in SSRS-based reports expire in 20 minutes version 6.0-10.0. NOTE: In Veeam ONE Reporter v11 the timeout is 12 hours. Cause The behavior is caused by Microsoft SSRS implementation specifics. Solution This behavior is by Microsoft SSRS design. More Information If you have...

Win32 error: The network path was not found. Code 53

Challenge A server processed by a job fails with the following error: Error: Failed to connect to guest agent. Errors: 'Cannot connect to the host's administrative share. Host: . Account: .... Win32 error:The network path was not found. Code: 53 Cannot connect to the host's administrative share...

Failed to start client agent on the host

Backup job fails with the error: 'Failed to start client agent on the host '...', Timeout to start agent'...

External Client App (ECA) for Veeam Data Cloud — Adapting to New Salesforce Security Requirements

Support Statement Summary of Changes to Salesforce Security Protocols Salesforce has introduced new security protocols for third-party applications accessing Salesforce organizations. This change affects all third-party products that integrate with Salesforce, requiring those vendors to transitio...

Release Information for Proxmox Virtual Environment Plug-In v12.1.3.217

Update: 2025-03-19 Consider the following regarding the Proxmox Virtual Environment Plug-In: The Plug-in build on this page, 12.1.3.217, is included automatically when upgrading to or installing Veeam Backup & Replication 12.3.1. The Plug-in only needs to be manually deployed by customers still...

Veeam Kasten GSB backups fail with the error "mkdir /tmp/kopia-log: read-only file system"

Challenge The backup for the workloads that uses Generic Storage Backup GSB fails with the error: mkdir /tmp/kopia-log: read-only file system\r\nUnable to create logs directory: mkdir /tmp/kopia-log: read-only file system Cause Veeam Kasten for Kubernetes 's datamover needs write access to the /t...

How to Configure WDS to PXE Boot Veeam Agent for Microsoft Windows Recovery Media

Purpose This article documents a method to configure Windows Deployment Services WDS to PXE boot the Veeam Agent for Microsoft Windows Recovery Media over a network. Solution General Guidance Disclaimer The information provided below is intended only as general guidance. The method and...

Veeam Backup for AWS Private Network Deployment Automation

Purpose This article provides information about Veeam Backup for AWS support for private deployment mode. It will explain how to use the attached script to configure network settings for buckets used as repositories and workers used for backups. To learn more about implementing Private Deployment...

Veeam Installer Service Displays Previous Version Despite Being Updated

Challenge After upgrading Veeam Backup & Replication, the Veeam Installer Service on other machines managed by Veeam Backup & Replication may be listed in Apps and Features or Programs and Features with a version that does not match Veeam Backup & Replication version. For example, an environment...

"Backup performance data collection failure"

Challenge Veeam ONE raises the Backup performance data collection failure alarm. Example 1 - Performance data cannot be collected from the repository associated with Veeam Backup & Replication. Example 2 - Performance data cannot be collected from a Hyper-V host managed by Veeam Backup &...

Troubleshooting Signature-Based Firewalls

Challenge Summary Data transfer is failing across a connection that is protected by an advanced firewall. The firewall uses signature-based detection. Relevant features may have names like antivirus, anti-spyware, intrusion prevention, or application control. Reported Firewalls This may affect an...

Surebackup with the Domain Controller role enabled causes Windows crash (the “blue screen” error) on the Veeam Backup server.

Challenge During a SureBackup or SureReplica job that processes a VM that has been configured to use the Domain Controller role, a Windows "blue screen" error occurs on the Veeam Backup Server. Cause Veeam Backup & Replication software mounts the VM's VMDK using VDK which can cause some anti-viru...

Backup job reports Unfreeze Error (Over VIX)

Challenge Backup job returns an error: Unfreeze error over VIX: Backup job failed. Running vssadmin list writers command within the guest may result in: Non-Retryable error for Volume Shadow Copy Service VSS of the Microsoft Exchange Replication service Cause This issue is Microsoft-related and...

Granular sudo Permissions for Installing Veeam Plug-ins for Enterprise Applications using Protection Groups

Challenge This article provides an example granular 'sudoer' configuration for the Linux account that will be used by Veeam Backup & Replication when installing Veeam Plug-Ins for Enterprise Applications using a Protection Group, specifically for Veeam Plug-in for Oracle RMAN and Veeam Plug-in fo...

Repeat Email Notification: "License update interrupted: Paid license is not installed."

Challenge After installing or upgrading to Veeam Backup for Microsoft 365 version 8 using Community Edition or an NFR Not-For-Resale license, email notifications are sent daily that state that state: Veeam Backup for Microsoft 365 Failed to update license License updated interrupted: Paid license...

Release Information for Veeam Backup for Nutanix AHV 6.1

This update has been superseded by Veeam Backup for Nutanix AHV 7.0, which was released alongside and supports only Veeam Backup & Replication 12.3. 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...

Backup error: "The instance configuration for this AWS Marketplace product is not supported."

Challenge The backup of an EC2 instance fails with the following error: Processing "instance-name" failed: The instance configuration for this AWS Marketplace product is not supported. Please see the AWS Marketplace site for more information about supported instance types, regions, and operating...

Uninstall or Upgrade of Veeam Agent for Microsoft Windows Fails Due to Missing MSI

Challenge When attempting to uninstall or upgrade Veeam Agent for Microsoft Windows , the Windows dialog box appears stating: The feature you are trying to use is on a network resource that is unavailable. Click OK to try again, or enter an alternate path to a folder containing the installation...