Considerations and Limitation - Live Resizing VHDX Disk

Challenge After live resizing a VHDX file, the following issue can occur based on the operation that was performed: Shrink -- If the VHDX associated with a VM is shrunk, the backup task for that VM will fail, and the following exception will be found in the Agent..Source. log file: cli|...

“Storage connection failure” alarm during the backup jobs with storage integration activity.

Challenge The alarm " Storage connection failure" is displayed in Veeam ONE when performing either of the following activities in Veeam Backup & Replication: Backup from Storage Snapshots Restore from Storage Snapshots While both Backup from Storage Snapshots and Restore from Storage Snapshots bo...

General Security Guidelines for Veeam Self-Service Backup Portal

Security Considerations The security advice in this article is provided as a courtesy and is not intended to replace the advice of a professional security consultant. The advice in this article has been tested with the assumption that the machine operating Veeam Backup Enterprise Manager and/or...

No Data or Old Data in Reports

Challenge Reports in Veeam ONE Web Client show no data or old data when generated Cause By default Veeam ONE is configured to run collection task at 3:00 am. Any data which comes after the task completion time will not be available in reports. A failed Reporter collection tasks could cause the...

'Events data collection failure' Issue

Challenge Veeam ONE raises Events data collection failure against Veeam Backup & Replication or Hyper-V server. Cause Permissions, UAC configuration, and firewall settings need to be configured. Solution Troubleshooting Checks Verify that the account used to connect to Veeam Backup & Replication ...

Required Applications and Permissions for Multi-OS FLR and Repository Support for Linux

Purpose This document provides information about required applications that must exist on Linux machines to function with Veeam Backup and Replication. Solution Permissions Requirements Permissions are dependent on the intended role of the Linux server. For more information, review this page of t...

Unable to install Backup Enterprise Manager

Challenge Attempting to install Backup Enterprise Manager results in a 'fail' during port selection, with the specified HTTPS Port being unavailable. Cause The port is already consumed by the World Wide Web Publishing Service Solution Disable the World Wide Web Publishing Service, proceed with th...

Microsoft Exchange logs are not being truncated in Veeam Backup and Replication 9.5

Challenge After upgrade to version 9.5.0.711 Microsoft Exchange logs no longer get truncated. In the Windows Application event logs you might get an error with an event ID 2034. Cause This is a known issue in build 9.5.0.711. If you disable Microsoft SQL logs truncation in Job properties then...

CID Mismatch in VMware on Restore with Backup and Replication V9 installed on Server 2008R2

Challenge Upon restore using Veeam Backup and Replication V9X you receive a CID mismatch error when you are on vSphere 5.5 Update 3b Cause This is a known issue with restoring with the option to use VM tags is enabled in vSphere 5.5 Update 3b Solution Known workarounds: 1. Upgrade Backup and...

multi-OS restore fails on Hyper-V 2008R2

To restore individual files and folders from file systems other than Microsoft Windows, you can use the multi-OS File-Level Restore wizard. To restore files from VM guest OS, Veeam Backup & Replic...

The tasks array included at least one null element

Challenge Management Pack fails to display a segment of the environmental topology or a portion of performance information. The vmspi.log default location: C:\Program Files\Veeam\Veeam Virtualization Extensions for System Center\Collector\Log contains the following entries: + VP038 buildInventory...

Transaction Log Truncation Failure for MSSQL Instances on Shared VHDX

Challenge When attempting to run a backup job for a Microsoft SQL Server that is in either a SQL Server Failover Cluster or AlwaysOn Failover Cluster with a shared VHDX, the backup job reports the warning: Failed to truncate transaction logs for SQL instances: . Possible reasons: lack of...

Veeam Agent for Microsoft Windows job displays warning: Partition exceeds disk layout

Challenge A Veeam Agent for Microsoft Windows backup job displays the following warning: Partition exceeds disk layout by bytes This warning may be accompanied by the error: Error: The drive cannot find the sector requested. Asynchronous read operation failed Failed to upload disk. Agent failed t...

Veeam Explorer for Microsoft SQL Server displays no content

Challenge When performing a SQL Item Restore, Veeam Explorer for Microsoft SQL Server launches successfully, but no content is displayed. The following is an example of what should be seen when the restore is working properly: Cause The account used to perform Application-Aware Image Processing f...

Backup Service Will Not Start Due To Group Policy

Challenge The Veeam Backup Service starts and then immediately stops. Svc.VeeamBackup.log contains errors such as: Error Unable to acquire privilege 'SeBackupPrivilege'. Error Unable to acquire privilege 'SeRestorePrivilege'. Cause According to the Required Permissions page of the user guide, the...

Replication job task fails with "Cannot process VM, template processing is disabled"

Challenge A Replication job displays the following error message for a VM that was previously able to be replicated: Task failed. Error: Cannot process vm-: template processing is disabled Copy Cause This issue occurs when a VM that was added to a replication job is converted to a template...

Critical update rollup for Veeam Backup and Replication 8.0.0.817

Challenge Critical update rollup for Veeam Backup and Replication 8.0.0.817 for Hyper-V This update rollup fixes the following Hyper-V processing issues: CBT does not track changes correctly on VHDX disks files larger than 2 TB veeam.com/KB1961 Existing Hyper-V backup and replication jobs...

Hyper-V Changed Block Tracking Troubleshooting

Challenge Backup and/or Replication jobs report that changed block tracking is not working properly. Article Applicability This article is only relevant when Veeam Backup & Replication is used with the following Hyper-V versions. In these older versions of Hyper-V there was no native CBT function...

Entire VM restore fails with 'An error occurred while taking a snapshot: Error.'

Challenge Entire VM Restore fails with: An error occurred while taking a snapshot: Error. Cause This can occur when a workingDir entry in the VMX causes the VM to attempt to direct snapshots to a different datastore that is not present in the site where the restore is taking place. Solution To...

Mount host is not specified for backup repository “Repository name”

Challenge When attempting to perform an Instant Recovery, Multi-OS FLR, or SureBackup the following error is thrown. Mount host is not specified for backup repository "" Multi-OS Restore: Instant Recovery: SureBackup: Solution Within the settings for the repository specified in the error there is...

Using the vSphere MOB (Managed Object Browser) to Troubleshoot Snapshot Creation

Purpose This article documents the procedure for manually creating a vSphere VM snapshot using the Managed Object Browser MOB. Solution Start by identifying the Managed Object Reference-ID MORef-ID of the VM for which the snapshot will be created. If the VM is being protected by Veeam Backup &...

Task for VM on ESXi 5.5 or 6.0 fails with "VDDK Error: 1"

Article Applicability This article discusses an issue resolved in ESXi 5.5 Patch 08 and ESXi 6.0 Patch 03. If the error "VDDK error: 1 Unknown error." occurs with an ESXi host running a version more recent than ESXi 5.5 Patch 08 or ESXi 6.0 Patch 03, it is advisable to engage with both VMware...

VM Uptime in Hyper-V Manager Might Reset During Backup

Article Applicability This article is relevant only to Hyper-V on Server 2012 and Server 2012 R2. Note: Server 2012 R2 reached end-of-life on October 10, 2023. Offline backup or saved state backup is a native Microsoft Hyper-V approach to quiesce VMs before taking a volume snapshot. Offline backu...

Automount is Disabled on VMware Backup Proxy

Challenge The Windows OS of a VMware Backup Proxy reports that automatic mounting of new volumes is disabled. Solution The automatic mounting of new volumes being disabled is an expected outcome for VMware Backup Proxies. As documented in the Veeam Backup & Replication User Guide: For Microsoft...

Storage I/O Control (SIOC) and Veeam

Challenge Veeam will cause additional IOPS on the datastore of the source VM and a target VM, in a replication job potentially impacting other VMs in the same datastore. In some cases this may cause the performance of other neighboring VMs on the same datastore to decrease during this heavy I/O...

Installation Fails with Patched Database

Article Applicability The issue documented on this KB is only relevant to Veeam Backup & Replication versions prior to v10. Starting with v10, a different error occurs for the same reason and is documented on KB4204. Challenge When installing Veeam Backup & Replication, selecting an existing...

There Is Not Enough Space on the Disk

Challenge A job or task reports the error: There is not enough space on the disk Cause This error is relayed by Veeam Backup & Replication when the underlying system reports the error while attempting to write a file. More often than not, this error quite literally means the disk has insufficient...

No network data available for ESX(i) hosts

Challenge SCOM shows the following alert: VP510 No metrics obtained for ESX hosts, failed to process performance or configuration data for hosts Under SCOM Monitoring - Veeam for Vmware- vSphere Host- Performance views, performance counters for hosts actually exist and show all data except for th...

Number of Cores Incorrectly Detected - Server 2003/XP

Challenge When adding a Server 2003 or Windows XP machine to Veeam, the true number of cores is not detected properly. Instead Veeam Backup & Replication only detects the number of Sockets. Example: A virtual machine with Server 2003, having a configuration of 2 Sockets and 4 Cores, is added to...

Veeam Backup & Replication - HP San Setup Guide

Challenge Veeam Explorer for SAN Snapshots lets you perform Veeam restores of entire VMs or individual items directly from HP StoreVirtual VSA and LeftHand snapshots. And like Explorer for Exchange, it's included in all editions of Veeam Backup & Replication. Cause This is a how-to guide on...

How to Relocate Veeam Backup & Replication Backup Files

Other Data Relocation-Related Articles KB2236 --Moving backup files to/from a Scale-Out Backup Repository. KB2321 -- Changing the backup location of Veeam Agent jobs operating in Standalone mode not directly controlled by Veeam Backup & Replication but targeting a Veeam Backup & Replication...

Limitation on number of EDBs mounted in Veeam Explorer for Exchange

Challenge The number of databases that can be mounted in Veeam Explorer for Exchange at a time is currently limited to 15. Solution If the limit has been reached, you will not be able to mount new databases. You can manually remove unnecessary mailbox stores in Veeam Explorer for Exchange and the...

Patch 1 Release Notes for Veeam Backup & Replication 6.5

More Recent Version Available Please find the latest version of Veeam Backup & Replication here: Veeam Downloads - Latest Version Challenge These are the issues resolved by the Patch 1 for Veeam Backup version 6.5.0.109. All patches are cumulative so each below fix is contained in this patch. Cau...

VM Loses Connection During Snapshot Removal

Challenge During the snapshot removal step of a Veeam Backup & Replication task, the source vSphere VM loses connectivity temporarily. Cause Veeam does not remove the snapshot itself; Veeam sends an API call to the vSphere environment to have the action performed. The snapshot removal process...

Quota Violation While Running WMI Queries

Challenge In the Veeam Management Pack for System Center UI, some monitored objects are grey or missing altogether. Standard troubleshooting steps do not help. The SCOM agent log on the Collector server contains the following error: WMI Error: 0x8004106C When you try to use the WBEMTEST utility,...

Re-IP issues: Win2008R2 with VMXNET 3 Adapter

Article Applicability The issue discussed in this article is strictly related to the use of VMXNET3 network adapters with the following vSphere VM guest operating systems: Windows 7 Windows 7 SP1 Server 2008 R2 Server 2008 R2 SP1 Challenge When you perform failover for a Win2008R2 server with a...

NWork Download Now Button Is Available But Nothing Happens?

Challenge When clicking the "Download Now" Button, you are redirected to another Veeam page or stay at the Download page. OR Cause This is due to the "Download Now" Button, by default, creates a new tab and popups the .zip file that is trying to be downloaded. Solution There are 2 solutions for...

"Error Subquery returned more than 1 value" during upgrade to 6.0.0.153

When upgrading to version 6 of Backup & Replication, you receive the error "Error executing SQL Script DBUpdate.sqlfilled. Line 7195. Subquery returned more than 1 value. This is not permitted when the subquery follows =,!=,,= or when the subquery is used as an expression."...

Creating snapshots in a different location than default virtual machine directory

How to change the default virtual machine working directory location for snapshots...

Configuration system failed to initialize

Product Improvements Starting with Veeam Backup & Replication 12, when launching the Console, the software will check the validity of the user.config file, and if found to be corrupt display a prompt notifying the user that "your user settings file is corrupted. " That prompt will allow the user ...

How to download a trial version of nworks products

When you try to download the management pack/SPI trial version from the Veeam Software website, the link does not work...

How to Adjust Collector Heartbeat Timeout

Purpose This article provides information regarding the configuration of the Collector Heartbeat setting, which determines how long the collector can go between heartbeats before being considered unreachable. Solution Configuration of the CollectorHeartbeatTimeout value is documented in the Veeam...

Gaps in Performance Data Graphs, Missing Alerts, or MP Views Greyed Out in Veeam Management Pack

Cause This problem can occur if the agent's cache needs to be cleaned up. Please note that you need to ensure that the Operations Manager agent has been configured properly after clearing cache. Otherwise, the issue will reoccur. Please refer to the Configuring Operations Manager Agent Knowledge...

During the export of log files the following error occurs: "Cannot access collector [collector_name]"

This articles provides suggestions to the error "Cannot access collector collectorname" that may happen during the export of log files...

Build Numbers and Versions of Veeam Plug-in for Xen

This KB article lists all versions of the Veeam Plug-in for Xen and their respective worker build numbers. Version | Plug-In / Worker Build | Release Date ---|---|--- Veeam Plug-in for Xen 1 Releases Veeam Plug-in for Xen 1.0 Included with Veeam Backup & Replication 13.1 | 13.1.0.295 | 2026-07-29...

Data Import for Veeam Data Cloud for Salesforce

Purpose This article explains the Data Import feature in Veeam Data Cloud for Salesforce VDCSF: what it does, which sources it currently supports, and how to prepare data for importation. This article is a feature summary only. Full procedural documentation can be found in the VDCSF User Guide...

List of Security Fixes and Improvements in Veeam Service Provider Console

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

Hardened Repository error: "veeam-grp-backup group has no rights on the backup folder"

Challenge When editing the properties of a Hardened Repository that has been upgraded to Veeam Hardened Repository version 13 for Veeam Backup & Replication 13 using the Veeam Infrastructure Appliance ISO, and was originally created using the Veeam Hardened Repository ISO version 2.0 for Veeam...

Release Information for Dell SC Series 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 Dell SC Series Plug-In v1.0.211, ensure that you are running Veeam Backup & Replication...

Impact of Domain name or Hostname Change on Veeam Appliances

Challenge After changing the FQDN of a Veeam Appliance--either by adding it to a domain or changing its hostname--some operations may be impacted. Solution SAML Authentication May Stop Working After the host name of the Veeam Software Appliance is changed, the Service Provider SP information will...