How to manually remove restore points from a VMware Replica

Purpose This article documents how to remove restore points from a Veeam Backup & Replication replica in a vSphere environment. The replica must be in a state where: the latest run was successful the job is not currently running failover is not currently active. Solution Remove old restore points...

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:...

How to Limit Parallel Disk Processing in Veeam Agent for Microsoft Windows

Purpose This article documents how to disable or limit parallel disk processing in Veeam Agent for Microsoft Windows. Solution The following registry values can used to control parallel disk processing on the machine where Veeam Agent for Microsoft Windows is installed: To disable parallel disk...

Protection Domain Has Third-Party Backup Snapshot(s)

Challenge Two different issues are possible: Scenario 1: Cannot Remove Protection Domain When trying to remove a protection domain containing the virtual machines, which are being backed up by Veeam Backup for Nutanix AHV backup appliance, the following error occurs: Specified protection domain h...

Hyper-V Backup Job fails after 72 hours "Failed to call RPC function 'HvSetVmBackupStatus'"

Challenge A backup of a Hyper-V VM fails after 72 hours with the following error: Failed to call RPC function 'HvSetVmBackupStatus': Snapshot with id 'snapshot-uuid' was not found. In the Task log for the specific VM %programdata%\Veeam\Backup\ \Task...log the following error is found: Error The...

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...

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...

How to Exclude Microsoft SQL Databases from Application-Aware Processing

Purpose This article documents how to exclude a Microsoft SQL Database from being processed by Application-Aware Processing. Limitations and Considerations Excluding a database from Application-Aware Processing only means it will not be processed as part of the VSS snapshot operation, and the...

"Established connection failed because connected host has failed to respond :10005"

Challenge A Windows Agent Backup or Windows Agent Policy type job within Veeam Backup & Replication fails with either of the following errors. A Veeam Agent Backup operating in Managed by backup server fails with the error: Error: Managed session has failed: A connection attempt failed because th...

How to Manually Update Suspicious File List

Intended Audience This article is intended for Windows-based Veeam Backup & Replication deployments where the software cannot access the internet to automatically update the SuspiciousFiles.xml file used by the Veeam Data Analyzer Service. In environments where the Veeam Backup Server can access...

Release Information for Veeam Backup & Replication 11a Cumulative Patches

More Recent Version Available Please find the latest version of Veeam Backup & Replication here: Veeam Downloads - Latest Version Requirements Before installing this Cumulative Patch using the Patch Installer, please confirm that you are running Veeam Backup & Replication 11a build 11.0.1.1261 wi...

Manually moving backup files between Scale-Out Backup Repository extents

Extent Rebalance is Now Built-In to Veeam Backup & Replication This article was written prior to the release of Veeam Backup & Replication 12. While the procedure may still work in Veeam Backup & Replication 12 and higher, we strongly advise you to instead consider using the built-in rebalancing...

How to Configure WinHTTP Proxy for Veeam Components

Known Limitation A tenant's Veeam Backup & Replication server cannot access Veeam Cloud Connect infrastructure components through HTTP/HTTPS proxy servers. All cloud-targeted traffic from the tenant's Veeam Backup & Replication server will ignore proxy settings. Purpose This article documents how...

Veeam ONE: SQL Express Maximum Database Size Limitation

Challenge When the Veeam ONE database is located in a SQL Express instance, if the database reaches the maximum allowed size, Veeam ONE will not be able to continue data collection, thus affecting data accuracy and alarm generation. Cause If you choose to host the Veeam ONE database on Microsoft...

JetError -1404, JET_errIndexNotFound, No such index

Challenge When trying to open a database in VEAD, you receive the following error message: JetError -1404, JETerrIndexNotFound, No such index Solution Log in to the domain controller from which you are trying to restore the database, run cmd as Administrator and run the following: 1. Type regsvr3...

How to Manually Change the VSA Host Management Certificate

Purpose This article documents the procedure for updating the Host Management Certificate used by the VSA Veeam Software Appliance. Note: The ability to update the certificate via the VSA Host Management Console may be added in a future version; however, as of version 13.0, it must be completed b...

How to Modify the Security & Compliance Analyzer's Password Complexity and Length Validation Check

Purpose This article documents how to adjust the Encryption Password Complexity and Length Validation check portion of the Security & Compliance Analyzer. Starting in Veeam Backup & Replication 12.3, encryption passwords will automatically be checked to see if they meet specific length and...

Option to Install Veeam ONE Agent is Unavailable (Greyed Out)

Challenge When attempting to install the Veeam ONE Agent on a Veeam Backup Server, theInstall agent option is unavailable and greyed out. Cause There are several possible causes for this issue: The Veeam ONE Agent is already installed on the Veeam Backup & Replication Server. The Veeam ONE Server...

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...

OneDrive / SharePoint Backup Fails with "Error: Invalid MIME content-length header encountered on read."

Challenge A backup job for OneDrive or SharePoint items processed by Veeam Backup for Microsoft 365 fails when attempting to download certain item versions, displaying the following error: Invalid MIME content-length header encountered on read Cause The issue is related to the download process us...

Veeam ONE Report Error "Invalid query string"

Note to Veeam Backup for Microsoft 365 Customers If you were directed here by the output of the Test-VBORepository cmdlet, please visit https://www.veeam.com/kb4704. The typo in the cmdlet output will be corrected in a future release. Challenge When previewing a report in Veeam ONE Web Client, th...

Unable to Interact with Some Hypervisors and Cloud Platforms

Veeam Backup & Replication 13.0.1 Upgrade Warning During the upgrade to Veeam Backup & Replication 13.0.1 or higher, the following warning may be displayed: Incompatible backup server certificate The certificate does not support child certificates creation and must be replaced for virtualization...

Antivirus Exclusions for Veeam Agent for Mac

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 Mac. Note: Antivirus will not always cause Veeam Agent for Mac functions to fail; antivirus software may also negatively impact backup...

Failed to prepare guest for SQL Server transaction log backup Details: Job owns SQL Server transaction logs backup

Challenge Microsoft SQL Server Log Backup job displays the following warning: Failed to prepare guest for SQL Server transaction log backup Details: Job owns SQL Server transaction logs backup This issue can also occur for Oracle Archived Log Backup, and will display the following warning: Cannot...

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-...

Public Folder Backup Hangs

Challenge An Exchange backup job that contains a public folder mailbox runs in an endless cycle, continuously getting changed items from one of the public folders. In the job logs, you can see multiple entries in the following format: Changed items: 0, deleted items: 0, read state changes: 100...

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...

Troubleshooting Certificate and Connection Errors in Cloud Connect

Challenge When adding a Service Provider on the tenant's Veeam Backup & Replication, either of the following errors occurs: Certificate validation failed. Unable to connect to the service provider. Certificate validation failed. Authentication failed because the remote party has closed the...

Job reports warning "Failed to truncate transaction logs for SQL instances: Possible reasons: lack of permissions, or transaction log corruption."

Challenge Backup Job with Application-Aware Processing enabled and configured to "process transaction logs" displays the warning: Failed to truncate Microsoft SQL Server transaction logs. Details: Failed to process 'TruncateSQLLog' command. Failed to truncate SQL server transaction logs 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 Upgrade the NATS Server Used by Veeam Backup for Microsoft 365

Purpose This article provides information about upgrading the NATS Server used by Veeam Backup for Microsoft 365. NATS Server Version Impact It is recommended that customers use the latest supported version of NATS Server with Veeam Backup for Microsoft 365 to avoid any potential performance...

How to Use Veeam Data Cloud Vault with ExpressRoute with Private Peering

Purpose This article documents the usage of Veeam Data Cloud Vault within environments that use Azure ExpressRoute with private peering. Solution Software Prerequisites Veeam Backup & Replication v12.3 or higher Veeam Data Cloud Vault Configuration Notes This article covers customers using...

Optimizing and Maintaining SQL Server Instance Hosting Veeam Service Provider Console Configuration Database

Purpose This article was produced in coordination with the Veeam R&D team to provide Service Providers with a comprehensive list of the most common performance improvements and maintenance actions relating to the underlying Microsoft SQL Server instance that hosts the Veeam Service Provider Conso...

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 assign ProPartner Portal Roles

Purpose This article documents how to assign internal VCSP employees a Pulse user role to allow them access to the VCSP Pulse portal within the Veeam ProPartner setup. Note: Roles can only be assigned by the employee of the ProPartner holding the ProPartner manager role. Solution To adjust the...

Build Numbers and Versions of Veeam Plug-in for oVirt KVM

This KB article lists all versions of the Veeam Plug-in for oVirt KVM and their respective appliance build numbers. Starting with Veeam Backup & Replication 12.3, the Release Notes for Veeam Plug-in for oVirt KVM , are included in the Veeam Backup & Replication Release Notes. Note: Prior to versi...

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...

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...

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 ...

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...

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...

"There is no FIB [summary.xml]" error with Veeam Cloud Connect v12.2

Updated Hotfix Release -- September 30, 2024 On 2024-09-30, a new revision to the hotfix package listed in this article was released. This updated hotfix file coincides with a repackaged release of the Veeam Backup & Replication 12.2 ISO dated 20240926, which integrates the new hotfix package...

Backup Repository in Invalid State - Causes and Troubleshooting Advice

This article is an extension of the Invalid State page within the Veeam Backup for Microsoft 365 User Guide. Purpose This article documents possible causes for a Veeam Backup for Microsoft 365 Backup Repository to be listed as having an Invalid status and provides troubleshooting advice. Note:...

Vulnerability Resolved in Veeam Service Provider Console 9.2.1

All vulnerabilities documented in this article were resolved in Veeam Service Provider Console 9.2.1.33875. 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...

Veeam Backup & Replication Platform Migration Guide (Windows to Linux)

Article Applicability This article is related to a new capability to migrate the configuration of a Windows-based Veeam Backup & Replication deployment to a Veeam Software Appliance. Due to the variability in how Veeam Backup & Replication can be used, configured, and deployed, and the complexity...

Build Numbers and Versions of Veeam Plug-in for Proxmox VE

This KB article lists all versions of the Veeam Plug-in for Proxmox VE and their respective worker build numbers. Version | Plug-in Build | Worker Build | Release Date ---|---|---|--- Veeam Plug-in for Proxmox VE 4 Releases Veeam Plug-in for Proxmox VE 4.0 Included with Veeam Backup & Replication...

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...

Support Statement regarding Microsoft CVE-2023-24932

Challenge Microsoft recently released update KB5025885 containing changes to secure boot. These changes require specific actions to be taken to continue using Veeam Agent for Microsoft Windows bare metal recovery media and other restore operations. After applying the Microsoft Update with...

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 ...