Appliance Installer Error: "An unknown error has occured"

Challenge When installing a Veeam Infrastructure Appliance on a physical or virtual machine using a bootable USB device created from the JeOS ISO file, the following error occurs: An unknown error has occurred Cause This problem happens during installation, following the disk partitioning step, a...

Veeam ONE v13 Upgrade Fails With "Failed to configure the product. Some configuration actions failed to complete."

Article Applicability This error occurs only when upgrading to Veeam ONE build 13.0.0.5630. This issue was resolved starting in Veeam ONE build 13.0.1.5860. Challenge The upgrade to Veeam ONE build 13.0.0.5630 fails with the following error during step 3 Upgrading Veeam ONE Server...: Failed to...

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 for Microsoft 365 8.2 and Cumulative Patches

More Recent Version Available Please find the latest version of Veeam Backup for Microsoft 365 here: Veeam Downloads - Latest Version Build Numbers and Versions of Veeam Backup for Microsoft 365 Requirements This release can be used to: update manually from a previous Veeam Backup for Microsoft 3...

Files with Microsoft Purview Sensitivity Labels Are Not Accessible After Being Restored

Challenge After restoring a file that was encrypted with a Microsoft Purview Sensitivity Label, attempting to open it results in an error similar to: Word was unable to read this document. It may be corrupt. Try one or more of the following: Open and Repair the file. Open the file with the Text...

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 |...

"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 Collect Logs from Veeam Appliance Installer

Purpose This article documents how to collect logs from the installer for the Software Appliances included with Veeam Backup & Replication 13 Veeam Software Appliance, Veeam Infrastructure Appliance, and Veeam Hardened Repository Appliance. This procedure may be required if an installation-relate...

Service Provider Migration to Unified Veeam Data Cloud FAQ

Below are the most commonly asked questions. What is changing with my Veeam Data Cloud for Microsoft 365 experience? Veeam is transitioning Veeam Cloud Service Providers VCSPs and their customers to Veeam Data Cloud, a unified multi-workload interface. This new experience allows you to manage...

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...

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...

Vulnerabilities Resolved in Veeam Backup & Replication 12.3.2.4165 Patch

All vulnerabilities documented in this article were resolved in Veeam Backup & Replication 12.3.2.4165 Patch. 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...

Appliance Installation Stuck on "Configuring addons"

Challenge During the deployment of a Veeam Backup & Replication v13 appliance Veeam Software Appliance, Veeam Infrastructure Appliance, or Veeam Hardened Repository, the installer stalls on the "Configuring addons" step. When this occurs, switching to tty1 Ctrl+Alt+F1, then using Alt+Tab to switc...

Migration to Unified Veeam Data Cloud FAQ

Below are the most commonly asked questions. What changed with the Veeam Data Cloud for Microsoft 365 experience? Veeam transitioned customers to the Veeam Data Cloud Platform, a unified multi-workload interface. This new experience allows customers to manage Microsoft 365, Entra ID, Salesforce,...

Applying Custom Settings to Veeam Software Appliance

Purpose This article documents the configuration files on the Veeam Software Appliance that correspond to registry locations in Windows used for custom settings in Veeam Backup & Replication. Custom registry-based settings for Veeam Backup & Replication on Windows can also be applied to the Veeam...

Migrating Veeam Kasten for Kubernetes to the Red Hat Certified Operators Catalog

Challenge One or more of the following symptoms may be observed in a Red Hat OpenShift environment running Veeam Kasten for Kubernetes : Upgrades are no longer available for the Veeam Kasten operator installed from the Red Hat Operator Marketplace catalog. Veeam Kasten Enterprise - Term or Veeam...

Fixing Restore Failures Due to QEMU Machine Version

Challenge When attempting to restore a VM with a QEMU version lower than 10 and disks in QCOW2 format to a Proxmox VE v9 node, the following error occurs: 16.09.2025 10:25:28 Error Linux-8.0 : Failed to reach the hypervisor. Error output: storage for 'local-LVM:vm-42-disk-1.qcow2' is configured...

Release Information for Veeam Plug-in for Proxmox VE v12.1.5.17

Requirements This update to the Veeam Plug-in for Proxmox VE requires: Veeam Backup & Replication build 12.3.2.3617 You can check the build number in the Veeam Backup & Replication Console's Main Menu ≡ under Help About. Veeam Plug-in for Proxmox VE build 12.1.3.217 You can check the current buil...

Build Numbers and Versions of Veeam Plug-in for Scale Computing HyperCore

This KB article lists all versions of the Veeam Plug-in for Scale Computing HyperCore and their respective worker build numbers. Version | Plug-In / Worker Build | Release Date ---|---|--- Veeam Plug-in for Scale Computing HyperCore 4 Releases Veeam Plug-in for Scale Computing HyperCore 4.0...

Support Statement - Veeam Software Appliance Customizations

Support Statement Installing additional Linux packages, third-party applications, or changing OS settings other than those that can be controlled via the Veeam Host Management Console on the Veeam Appliances is not supported. Veeam Customer Support cannot provide technical support for appliances...

Cannot request cryptocontainer. Win32 error:Keyset as registered is invalid

Challenge A Veeam Agent for Microsoft Windows backup job completes with the following warnings: Cannot request cryptocontainer. Win32 error:Keyset as registered is invalid. and SQL VSS Writer is missing: databases will be backed up in crash-consistent state and transaction log processing will be...

Failed to process site: {}. Failed to resolve personal site owner.

Challenge Backup job of a personal site fails with: Failed to process site: 0. Failed to resolve personal site owner. For more details, see KB4756. Cause This error indicates that Veeam Backup for Microsoft 365 was unable to correlate a Personal Site to a specific user because the owner of the si...

How to offboard a single protection unit from an Express backup policy in Veeam Data Cloud for M365

Challenge Issue Summary After creating an Express Protection Policy in Veeam Data Cloud for Microsoft 365, backups are retained for one year. These Express Protection Policies are built on the Microsoft 365 Backup storage backend. Over time, a situation may arise where you need to offboard a sing...

Guidelines for Mass Instant Recovery to Azure

Article Applicability This article contains information related to Veeam Backup & Replication build 13.0.1.180 and later, as performance for IR to Azure was significantly improved starting with this build. Challenge When attempting to perform mass recovery using Instant Recovery to Azure, the...

Azure Block Mode Export Failure Due to NetworkAccessPolicyIsDenyAll with Veeam Kasten

Challenge If using Veeam Kasten to protect persistent volumes provisioned with the Azure Disk CSI provisioner, and encounter the following error during the block mode export phase of a policy run: Failure in exporting restorepoint with log details similar to: Access not permitted for resource...

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-...

Required Package Changes in Solaris 10 and 11.3

Challenge Solaris 10 does not include the CA certificates required for S3 repository connections, nor does it natively provide OpenSSH with modern features. For secure S3 access and SSH communications with the Veeam Software Appliance VSA for Veeam Backup & Replication, you must install both...

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...

Console Connection to Veeam Software Appliance Unstable When IPv6 is Disabled

Challenge When IPv6 has been disabled in the Veeam Host Management Console settings, actions within the Veeam Backup & Replication Console on a remote machine may be slow to initiate or fail if IPv6 has not also been disabled in the Console settings. Cause This issue occurs when the IPv6...

Connection to Veeam Software Appliance Fails With: "Authentication failed: invalid credentials"

Challenge When attempting to use local account credentials to connect to a Veeam Software Appliance that is joined to a domain, the Console fails to connect with the errror: Authentication failed: invalid credentials Cause This error occurs due to an account collision caused by the...

How to Configure NFSv4 on IBM AIX

Purpose This article documents steps to enable NFSv4 on IBM AIX to enable backup mount support for Veeam Agent for IBM AIX introduced with Veeam Backup & Replication 13. Solution Part 1: Configure the Host Resolution 1. Open the /etc/netsvc.conf file. 2. Ensure that the hosts parameter is set to...

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...

The provided one-time code is incorrect. Check if the backup server time is correct.

Challenge When attempting to connect to the Veeam Host Management Console, after entering the MFA TOTP code, the following error occurs: The provided one-time code is incorrect. Check if the backup server time is correct. Solution There are two potential causes for time mismatch: Cause 1:...

Release Information for Veeam Backup & Replication 13 and Updates

Release Information 13.1.1.18 2026-08-12 Resolved issues Veeam Software Appliance After upgrading a Veeam Software Appliance Linux-based Veeam Backup & Replication that is configured to use an HTTP or HTTPS proxy, core services fail to start and the Web UI returns HTTP 502 errors along with the...

Release Information for Veeam ONE 13 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...

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...

Failed dependencies: libmsi1 is needed by veeam-guest-interaction-proxy

Challenge Attempting to add a Linux server as a managed server fails with the following error: Failed dependencies: libmsi1 is needed by veeam-guest-interaction-proxy Rocky Linux may also display the following error if the libmsi1 package is already installed: Failed dependencies: ntfs-3g is need...

Overcoming TCP/IP Connection Limits with PgBouncer and PostgreSQL on Windows

Challenge When running PgBouncer and PostgreSQL on Windows, especially under high-load scenarios with frequent connect/disconnect cycles, you may encounter exhaustion of available TCP ports. This is due to many connections ending up in the TIMEWAIT state, preventing immediate reuse of those ports...

File-Level Recovery (FLR) in Veeam Kasten for Kubernetes

Purpose This article documents how to perform enterprise-grade protection and granular recovery of Kubernetes workloads using Veeam Kasten for Kubernetes integrated with Veeam Backup & Replication VBR. It provides step-by-step guidance on creating backup policies, exporting backups to VBR, and...

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...

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:...

Unable to Login to Web UI After Enabling MFA

Article Applicability This article is regarding a issue that was discovered in Veeam Recovery Orchestrator build 7.2.1.286, which was available for download between 2025-07-08 and 2025-07-17. The issue documented in this article was discovered, confirmed, and patched and a new build was released...

How to Install and Configure PgBouncer for Veeam Backup for Microsoft 365

PgBouncer must not be deployed on the machine where Veeam Backup for Microsoft 365 is installed. This article is intended only for deployments where the PostgreSQL Instance used by Veeam Backup for Microsoft 365 is hosted on its own dedicated server. For deployments of Veeam Backup for Microsoft...

Support for AWS Elastic VMware Service (EVS) with Veeam Backup & Replication

Support Statement Veeam Backup & Replication fully supports AWS Elastic VMware Service EVS, treating it as a standard vSphere environment. Built on VMware Cloud Foundation VCF 5.2.x, EVS provides customers with comprehensive administrative access to vCenter, NSX, and other essential VMware...

SharePoint Sites May Not Be Displayed When Browsing Backups

Challenge When browsing backups or backup copies, SharePoint root sites and their subsites may not be visible. Cause If a backed-up SharePoint subsite is moved between repositories using the Move-VBOEntityData cmdlet, or removed from a repository using the Remove-VBOEntityData cmdlet, the metadat...

Release Information for Veeam Plug-In for Microsoft Azure 8 Cumulative Patches

Requirements Please confirm that you are running Veeam Plug-In for Microsoft Azure v8 build 8.0.0.334 or later before upgrading. You can find the currently installed build number Product version in the About section under Configuration | Support Information | Updates. After installing Veeam Plug-...

How to Register a Service Provider’s Veeam Data Cloud Vault on a Tenant's VBR Server

Legacy Functionality This article explains a method relevant only to Veeam Backup& Replication 13.0.1.1071 and older. Starting in Veeam Backup & Replication 13.0.1.2067, the backup server authorization now communicates directly with Veeam Data Cloud VDC, removing the need to be a License Admin...

Upgrading the PostgreSQL Database Engine Software Used by Veeam Backup for Microsoft 365

Support Scope This article is provided as a courtesy to give customers a high-level explanation of how to upgrade the underlying PostgreSQL database engine used to host the Veeam Backup for Microsoft 365 configuration database. Per the Veeam Customer Support Policy, section 10: Support for Veeam...

“Failed to retrieve certificate” When Adding AWS Snowball Edge Device

Article Applicability The error message documented in this article can also occur when the Service point specified is invalid or cannot be reached due to a firewall, which is documented in KB4328. This article is specifically regarding a situation in which the correct Service point has been...

Search Best Practices in Veeam Data Cloud for Microsoft 365

New Search Experience for Veeam Data Cloud for Microsoft 365 We are excited to announce the initial rollout of our new search feature, designed to significantly improve the speed and efficiency of your search experience. The new search supports deleted item recovery and restore point search witho...