NFC connectivity troubleshooting steps

Challenge A job fails with an error related to NFC Network File Copy connectivity. For example: Error: NFC storage connection is unavailable. Failed to create NFC download stream. Failed to create NFC upload stream. Cause The cause of most NFC errors fall into 4 primary categories: DNS The proxy ...

Release Information for NetApp ONTAP Plug-In for Veeam Backup & Replication

This plug-in leverages the Veeam Universal Storage API, which enables storage OEMs to allow Veeam Backup & Replication integration to the arrays for backup and replication jobs. Requirements Before installing NetApp ONTAP Plug-In v2.0.14, ensure that you are running at least Veeam Backup &...

Immutability Warning for Data Domain Repository: "Immutability flag on backups was set with warning"

Challenge A backup job that targets a Dell Data Domain repository completes with the warning, "Immutability flag on backups was set with warning: ", specifically with the endings: Immutability period for some backups exceeds the maximum value allowed by the target repository, using the maximum...

Build Numbers and Versions of Veeam Plug-In for Nutanix AHV

This KB article lists all versions of the Veeam Plug-In for Nutanix AHV and their respective appliance build numbers. Version | Plug-In Build | Appliance Build | Release Date | Release Notes ---|---|---|---|--- Veeam Plug-In for Nutanix AHV 10 Releases Veeam Plug-In for Nutanix AHV 10.0 Included...

How to Back Up a Windows Failover Cluster with Veeam Agent for Microsoft Windows

Solution Information regarding Failover Cluster Support is available in the Veeam Agent Management Guide: Failover Cluster Support How to Protect Failover Clusters If this KB article did not resolve your issue or you need further assistance with Veeam software, please create a Veeam Support Case...

"Database connection settings for the Microsoft Entra ID backup repository cannot be found."

If you are encountering this error after recently upgrading to Veeam Backup & Replication 12.3, and that upgrade failed on the first attempt, and you attempted the upgrade a second time, please review the section discussing "For Customers Who Ran the Upgrade a Second Time and It Succeeded" on...

After Upgrade to Veeam Backup & Replication 12.1, Backup of Linux VM Fails With: "Failed to check fingerprint"

Challenge After upgrading to Veeam Backup & Replication 12.1, Backup jobs for Linux VMs that operated successfully before the upgrade now fail with: Unable to connect to guest OS for guess process. Failed to check fingerprint. Cause During the upgrade to Veeam Backup & Replication 12.1, the forma...

SharePoint backup jobs fail with: The remote server returned an error: (429)

After upgrading to Veeam Backup for Microsoft 365 7, backup jobs may fail with this error due to SharePoint Online throttling policy...

Release Information for Veeam Backup & Replication 12 Day 0 Update

Update Applicability This "Day 0" update for Veeam Backup & Replication 12 is strictly intended for servers using the RTM release build 12.0.0.14 02. If Veeam Backup & Replication 12 GA build 12.0.0.14 20 is installed, this update can be ignored as it is not needed. All resolved issues listed in...

SureBackup Ping Test Timed Out

Challenge A VM or group of VMs fail to pass the SureBackup Ping Test. Solution Below is a list of the most commonly observed causes of Ping Test failures and solutions for each. A router exists between the Veeam Server and Virtual Lab. The vNIC for the Isolated Network is misconfigured. The...

Using Veeam Agents with Xen Orchestra (Vates XCP-NG and XenServer)

Purpose This article documents how to use Veeam Agent for Microsoft Windows and Veeam Agent for Linux , managed by Veeam Backup & Replication, to protect virtual machines in XenServer and XCP-NG environments that are managed by Xen Orchestra. While these hypervisors are not directly supported for...

The "Index was outside the bounds of the array" error while opening nworks UI

When the error "Index was outside the bounds of the array" occurs when opening nworks UI, this article provides the steps to address the corrupted XML file...

How to Install Grafana with K10 Dashboard and Data Sources Pre-provisioned

Purpose Starting in Veeam Kasten for Kubernetes v7.5.0, Grafana will no longer be included by default. This in-depth technical guide will demonstrate the process of installing Grafana on Kubernetes and populating it with Kasten Data. It will allow you to quickly access pre-provisioned Kasten...

"Failed to connect to the database." Updater Configuration Check

Challenge When updating Veeam Backup & Replication the Configuration Check fails with either: Failed to connect to PostgreSQL server localhost:5432. An existing connection was forcibly closed by the remote host SSPI authentication failed for user Cause The account being used to run the update...

Antivirus Exclusions for Veeam Backup for Microsoft 365

Purpose This article documents antivirus exclusions that may be created to reduce the impact that antivirus software has on the functionality of Veeam Backup for Microsoft 365. These antivirus exclusions may be applied to the Windows built-in antivirus or third-party antivirus software. Note:...

Backup Copy or Replication job using WAN accelerators fails with "Source WAN accelerator error: Failed to decompress LZ4 block"

Challenge A Backup Copy or Replication job that uses WAN accelerator fails with any of the following errors: Error: Source WAN accelerator error: Failed to decompress LZ4 block: Bad crc Error: Source WAN accelerator error: Failed to decompress LZ4 block: Incorrect decompression result or length...

Backup job fails with “The request is not supported. Failed to duplicate extent” message.

Challenge A backup job targetted at an ReFS based repository fails with " The request is not supported. Failed to duplicate extent" Examples: Agent: Failed to process method Transform.CompileFIB: The request is not supported. Failed to duplicate extent. Target file: vbk, Source file: vib,...

Backup Failure: "There are currently x usable fault domains. The operation requires y more usable fault domains."

Challenge A Veeam Backup & Replication job protecting a VM stored on a vSAN fails with the error: Error: There are currently x usable fault domains. The operation requires y more usable fault domains. Cause This error is relayed from the snapshot operation failure message within the vSphere...

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,...

Unexpected Increase in Exchange Incremental Data Processed By Veeam Backup for Microsoft 365

May 2025 Update This article has been updated with new information regarding the February 2025 occurrence and the results of the subsequent investigation. Issue Summary First Occurrence -- August 7 - August 21, 2023 Some customers using Veeam Backup for Microsoft 365 to back up Microsoft 365...

How to Manually Configure Nginx For Use by Veeam Backup for Salesforce

Purpose This article documents how to manually configure Nginx for use with Veeam Backup for Salesforce 3.1 and higher . Solution 1. Before making configuration changes, stop the Veeam Backup for Salesforce backend service: systemctl stop vbsf-backend.service Copy 2. Use Nginx template...

Secure channel communications stop working after disabling TLS 1.0/1.1

After disabling TLS 1.0/1.1, Veeam functionality which utilizes the SCHANNEL security provider, such as license auto-update, license usage reporting and Veeam explorers with remote mounts stop working...

How to Configure HTTP Proxy for Linux-based Veeam Components

Purpose This article documents how to configure HTTP and HTTPS Proxy settings for Linux-based components, including the Veeam Software Appliance and JeOS-deployed Veeam Infrastructure Appliances, in environments that require a proxy to access the internet. Note: For proxy configuration settings f...

After Enabling MFA, Veeam Backup Server Is Listed as Inaccessible in Veeam Service Provider Console

Challenge After enabling multi-factor authentication MFA in Veeam Backup & Replication or Veeam Cloud Connect, that server may become listed as "inaccessible" within Veeam Service Provider Console yet the Veeam Management Agent for VSPC continues to display a "healthy" status. Cause When MFA is...

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...

How to restore vCenter Server without a vCenter Server

Challenge The vCenter Server is not available and the vCenter Server VM needs to be restored. Solution To restore the vCenter Server, you will need to add one of the individual ESXi hosts to Veeam Backup & Replication, allowing you to target that host directly to restore the vCenter VM. Possible...

WAN Accelerator Fails to Install

Challenge When creating a new WAN Accelerator or reconfiguring an existing WAN Accelerator, the installation of the WAN Accelerator package fails with the error: Error Installing package WAN Accelerator Error: Error 1920.Service Veeam WAN Accelerator Service VeeamWANSvc failed to start. Verify...

0x8004230F or Error: VSSControl: -2147212529 (VSS_E_UNEXPECTED_PROVIDER_ERROR)

Challenge A job fails with the error: Failed to prepare guest for hot backup. Error: VSSControl: -2147212529 Backup job failed. Discovery phase failed. Cannot add volumes to the snapshot set. Cannot add a volume to the snapshot set. Volume name: \?\Volume. Cannot add volume to the set of volumes...

Release Information for Veeam ONE 12 and Updates

Veeam ONE v12 Releases 12.3.0.7165 2026-08-25 What's New Veeam ONE 12.3 Patch 1 is a cumulative maintenance and security update for Veeam ONE 12.3. It resolves reported issues across reporting, monitoring, alarms, licensing, and integrations, adds REST API and ServiceNow enhancements, and address...

Repository 'Used Space' Value Greater Than 'Capacity'

Challenge A Repository listed under Backup Infrastructure Backup Repositories has a 'Used Space' value that is greater than the 'Capacity' of the storage. Cause This occurs when repositories are backed by storage that has the ability to reduce the space used by restore points, like deduplication...

Tape Jobs fail with I/O errors or (SCSI) Bus resets

Challenge Failures occur during the File to tape or Backup to tape jobs. The jobname.log shows error messages similar to: error: The request could not be performed because of an I/O device error error: Tape fatal error.\nThe I/O bus was reset Cause Depending on the type of connection, controller ...

Job Fails Due to Quiesced Snapshot Creation Failure

Challenge A Backup or Replication job for a VMware Virtual Machine fails with either of the following errors: Failed to create VM snapshot. Error: CreateSnapshot failed, vmRef "vm-", timeout "1800000", snName "VEEAM BACKUP TEMPORARY SNAPSHOT", snDescription "Please do not delete this snapshot. It...

How To Enable DDBoost Immutability with Governance Mode

Purpose This article provides additional information for enabling immutability for the Dell Data Domain deduplicating storage appliance when using governance mode, as referenced in the Veeam Backup & Replication User Guide here: Veeam Backup & Replication User Guide Backup Infrastructure Componen...

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...

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...

CVE-2025-23120

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...

Veeam Service Provider Console – Compile and Upload Management Agent Logs

Challenge This article covers how to Management Agent logs for both client agents and the Cloud Connect agent. Solution Export Management Agent Logs To export Veeam Service Provider Console Management Agent logs for one or more client agents, please: 1. Log into the Veeam Service Provider Console...

How to Migrate Veeam Service Provider Console to a New Server

The article describes how to move Veeam Availability Console installation and its database to a new server...

Task fails with error: Application is Shutting Down

Challenge Jobs of any type fail with the error, "Application is shutting down." For example: Application is shutting down. Failed to download disk. Shared memory connection was closed. Failed to upload disk. Agent failed to process method DataTransfer.SyncDisk Copy BackupSynthesizedStorageToTape...

Antivirus Exclusions for Veeam Agent for Microsoft Windows

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 Microsoft Windows. These antivirus exclusions may be applied to the Windows built-in antivirus or third-party antivirus software. Note:...

How to Activate Access to Microsoft Graph Teams Export APIs

Preliminary Action This article documents how to configure your app registration to access the Microsoft Graph Export API for Teams, which is necessary to enable Veeam Backup for Microsoft 365 6a and newer to protect Teams public channel posts. Once the Teams Protected APIs are accessible and Vee...

Adding DDboost repository results in error 5049 or 5037

When attempting to add an EMC Data Domain repository, one of the following errors is received:Illegal operation. Err: 5037Failed to connect to '\datadomain'.ORUnable to connect to Data Domain...

Veeam Backup & Replication 9.0 Day 0 Update

Challenge This update is provided to enable upgrading existing installations of Veeam Backup & Replication 9.0 partner preview build 9.0.0.773 to generally available version of Veeam Backup & Replication 9.0 build 9.0.0.902. This update addresses a number of issues reported by our partners on the...

How to Create a Veeam Support Case

Phone Support To improve case handling, you must Open a Case via the portal before calling in. The phone system will ask for your case number and use advanced routing to connect you with the engineer handling your case or an appropriate product/feature specialized support engineer. Purpose This...

How to Migrate the Veeam ONE Database

Article Applicability This article is specifically about relocating the Veeam ONE database to a different Microsoft SQL Server Instance and the Veeam ONE deployment remaining on the same machine. For information about relocating the Veeam ONE deployment, review: KB1801: How to Migrate Veeam ONE...

Guidance for Veeam Data Cloud Customers in Middle East Regions

Summary Veeam is monitoring risks that may affect cloud infrastructure in the Middle East regions, including the UAE, Qatar, and Israel. Customers using Veeam Data Cloud services in these regions should review their data resilience requirements and consider whether additional geographic separatio...

How to Configure HTTP Proxy for Windows-based Veeam Components

Purpose This article explains how to configure an HTTP proxy for Windows-based Veeam components when the server must reach the internet through a proxy. It applies to Veeam products installed on Windows, including Veeam Backup & Replication, Veeam Cloud Connect, Veeam ONE, Veeam Service Provider...

Veeam Intelligent Diagnostics signature UID field

If you are not using Veeam ONE or your Veeam ONE server is not connected and monitoring Veeam Backup & Replication, you will not have a VID to enter during case creation. Simply leave the field blank. Purpose This article provides answers to frequently asked questions about the "Veeam Intelligent...

SQL VSS writer fails for SQL localdb on Azure AD Connect Sync server.

Challenge Backup or replication jobs with Application Aware Image-Processing enabled may fail on the server hosting Azure AD Connect Sync with an error indicating the SQL writer has failed. After the job has failed, running "Vssadmin list writers" from an administrative command prompt on the Azur...

How to Change Veeam ONE Web Client Port

Purpose This article documents the procedure for changing the port used by the Veeam ONE Web Client, which by default is 1239. Solution Desktop Shortcut Not Automatically Updated This procedure does not update the Veeam ONE Web Client shortcut on the desktop C:\Users\Public\Desktop. Part 1: Updat...