Installing package Transport Error: Error 1935.An error occurred during the installation of assembly component

Challenge When Veeam Backup & Replication attempts to install the Veeam Transport package VeeamTransport.msiC:\Program Files\Veeam\Backup and Replication\Backup\Packages\VeeamTransport.msi the package fails to install, and the following errors may be displayed in the UI: Installing package...

How to reset vSphere Virtual Machine CBT

Purpose This document provides details for resetting the CBT Changed Block Tracking of a vSphere VM. The Veeam Backup & Replication may display the following message: CBT data is invalid, failing over to legacy incremental backup. No action is required, next job run should start using CBT again. ...

Veeam Backup & Replication 13.0.1 In-Place Upgrade Version Requirement

Challenge When attempting to upgrade an existing Veeam Backup & Replication deployment to version 13, the installer displays a message stating: Unable to upgrade Veeam Backup & Replication: you can upgrade from version 12.3.1.1139 or later only. Solution Before attempting an in-place upgrade to...

Windows 11 24H2 | Server 2025 - Recovery Media Issue

Issue Resolved in May 13 2025 Windows Update KB5058411 The underlying issue causing recovery media to have the problems documented in this article was resolved in Microsoft Update KB5058411 for Windows 11 and Server 2025. After applying the update, the recovery media must be recreated. Challenge...

Release History for Veeam Service Provider Console 8.1

Newer Product Version Available A complete list of Veeam Service Provider Console versions and their release dates is available on KB4464: Build Numbers and Versions of Veeam Service Provider Console. Veeam Service Provider Console 8.1 Builds 8.1.0.21999 Security Vulnerabilities CVE- 2024-42448 |...

Veeam Recovery Orchestrator Vulnerability (CVE-2024-29855)

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...

Security Issue in Microsoft Azure Plug-In for Veeam Backup & Replication

Issue Details This article highlights a security-related issue in Microsoft Azure Plug-In for Veeam Backup & Replication 12.1.5.99 that may allow a user accessing the Veeam Backup & Replication server to obtain the administrator credentials of the Veeam Plug-In for Microsoft Azure backup applianc...

SureBackup VM Power On fails with: "Failed to extend swap file" or "Error: Insufficient resources."

Challenge A SureBackup job, for a VMware environment, fails during the VM Power On step with either of the following errors: Error: Module 'MonitorLoop' power on failed. Module 'MonitorLoop' power on failed. Failed to extend swap file...

Failed to call RPC function 'StartAgent': Timed out requesting agent port for client sessions.

Challenge A task fails with the error: Error: Failed to call RPC function 'StartAgent': Timed out requesting agent port for client sessions. Cause These errors may occur because of either: A firewall prevents the remote machine from initiating communication on one or more of the assigned...

The specified network name is no longer available

Challenge When accessing backup files on a CIFS SMB repository, Veeam Backup & Replication reports either of the following errors: The specified network name is no longer available. code 59, 0x8007003B An unexpected network error occurred. code 64, 0x80070040 Veeam Backup & Replication uses SMB...

CreateSnapshot failed, the operation is not allowed in the current state

Challenge A task fails for a vSphere Virtual Machine that is being processed by Veeam Backup & Replication with the error: Error: The operation is not allowed in the current state. A related error can be seen in the vSphere Client for the VM: This error may occur during any job in which Veeam...

Build Numbers and Versions of Veeam Plug-In for HPE Morpheus VM Essentials

This KB article lists all versions of the Veeam Plug-In for HPE Morpheus VM Essentials and their respective worker build numbers. Version | Plug-In / Worker Build | Release Date ---|---|--- Veeam Plug-In for HPE Morpheus VM Essentials 2 Releases Veeam Plug-In for HPE Morpheus VM Essentials 2.0...

Most Common Issues with Salesforce Connected App in Veeam Data Cloud for Salesforce

Purpose This article documents the changes to Connected App usage in Veeam Data Cloud for Salesforce resulting from Salesforce's restriction of uninstalled connected apps, effective Autumn 2025. It provides guidance on authorization requirements, common connection errors, and necessary permission...

Veeam Service Provider Console Vulnerability (CVE-2024-42448 | CVE-2024-42449)

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...

CVE-2022-26504

Challenge Vulnerability CVE-2022-26504 in Veeam Backup & Replication component used for Microsoft System Center Virtual Machine Manager SCVMM integration allows domain users to execute malicious code remotely. This may lead to gaining control over the target system. Severity : High CVSS v3 score ...

Exchange Backup Jobs Warning "Failed to find group owner account"

Challenge Backup jobs with Microsoft Exchange items may result in the warning message shown in both the Veeam Backup for Microsoft 365 console and the Veeam.Archiver.Proxy.log file. Processing mailbox $mailboxName completed with warning: Failed to find group owner account This appears in the...

How to Simulate Veeam Backup & Replication Disk I/O

Purpose This article provides examples of using common workload simulators diskspd and fio to simulate Veeam Backup & Replication disk I/O. Do Not Send Test Output Files to Veeam Support The write test output files testfile.dat do not contain diagnostic data. As such, please do not attach them to...

VSS Freeze Wait Timeout

Challenge A Backup or Replication tasks fails with the following errors: "VSSControl: Failed to prepare guest for freeze, wait timeout 900 sec." "VSSControl: Failed to freeze guest, wait timeout" Solution Possible Security Software Interference Anti-virus software may impede VSS operations. As an...

Archiving Job to Azure Archive Storage fails: "This request is not authorized to perform this operation."

Challenge Archiving Job to Microsoft Azure Archive Storage fails with the following error: This request is not authorized to perform this operation. Agent failed to process method LongTerm.GetRepositoryKey Copy Cause This issue may be directly related to permissions but can also occur due to...

CVE-2022-26503

Challenge Vulnerability CVE-2022-26503 in Veeam Agent for Microsoft Windows allows local privilege escalation. An attacker who successfully exploited this vulnerability could run arbitrary code with LOCAL SYSTEM privileges. Severity : High CVSS v3 score : 7.8 Cause Veeam Agent for Microsoft Windo...

Veeam Recovery Media for Linux OS, Workarounds

This article documents rare issues that may be experienced when using the Veeam Recovery Media for Linux OSs and workarounds for them. Veeam Recovery Media fails to boot from a USB flash drive created with third-party ISO flashing software. Challenge A Linux machine cannot boot the Veeam Recovery...

How to Customize the VSPC Welcome Email

Article Applicability This article is relevant only to Veeam Service Provider Console 9.2 and older. Starting in Veeam Service Provider Console 9.3, the email template model has been changed and can no longer be customized as described in this article. Purpose This article documents how to...

List of Security Fixes and Improvements in Veeam Agent for Linux

Purpose This article describes all security-related fixes and improvements introduced in each release or update of Veeam Agent for Linux. The goal of this article is to provide our customers' security and compliance teams with the detailed information on security improvements between releases, in...

How To Configure Veeam Backup for Microsoft 365 to Use Microsoft Graph Export API for Teams

Purpose This article documents the procedure for enabling Veeam Backup for Microsoft 365 to backup Teams public channel posts using the Teams Export APIs.Veeam Backup for Microsoft 365 backs up Teams channel messages. For more information on the limitations of Teams chat backup, click here. In...

Scale-Out Backup Repository Offload task fails with "There is not enough space on the disk"

Article Applicability This KB Article is specific to an issue where a SOBR Offload task fails with an error reporting that "There is not enough space on the disk " and the path specified in the error contains 'VeeamBackupTemp '. Challenge Scale-Out Backup Repository's Offload task fails with erro...

How to Collect Logs for Veeam Plug-in for SAP HANA

Purpose This article documents how to collect the diagnostic information needed for a support case involving the Veeam Plug-in for SAP HANA. Solution 1. Collect diagnostic information as documented in the four sections below. 2. Combine the data into a single .zip file. 3. Attach the zip file to...

One or More Networks Mapped to the same cloud network

Challenge A Replication job targeting Cloud Hosts completes with the following warning: One or more source networks were possibly mapped onto the same cloud network. Simultaneous partial failovers of VMs residing on those networks may result in issues. Cause This warning is displayed when the...

Recovery Media Creation and Servers with Cluster Shared Volumes

Challenge The Windows Agent Backup job for a failover cluster node with a cluster shared volume displays the following notice: Skipping recovery media collection: cluster contains CSV disks Attempting to create recovery media manually using the Recovery Media Creator on the failover cluster node...

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...

VSS Errors Related to the 'NTDS' VSS Writer

Challenge This article discusses an error that occurs due to VSS and Veeam's Guest Processing technique for Domain Controllers. It is relevant to all backup jobs for both virtual and physical Domain Controllers. A job processing a Domain Controller with Application-Aware Processing fails with one...

Hyper-V Resilient Change Tracking Performance Issues

Challenge General Hyper-V OS performance degradation can occur when using a backup solution to export Hyper-V VM snapshots during backup operations. Solution Based on investigations between Veeam and Microsoft, two underlying causes have been identified. Resilient Change Tracking Resilient Change...

Restore to oVirt KVM VM Post-Restore Recommended Actions

Purpose This article documents recommended post-restore actions that should be taken after restoring VMs, physical machines, and cloud machines to the oVirt KVM hypervisor. Solution Starting in the oVirt KVM Plug-In included with Veeam Backup & Replication 12.3, a feature has been added that allo...

"HTTP protocol is not supported, please use HTTPS." Error When Adding Object Storage

Challenge When attempting to add an S3-compatible Object Storage Repository, the wizard displays the error: HTTP protocol is not supported, please use HTTPS. If the service point is then modified to change to HTTPS, the wizard then displays the error: Failed to retrieve certificate from...

Veeam Support for Azure Local

Azure Local is the new name for Azure Stack HCI Azure Stack HCI is now considered part of Azure Local. Learn more about this rename in the Microsoft Documentation: Renaming Azure Stack HCI to Azure Local. Purpose This article documents support for backup, restore, and replication of virtual machi...

SQL Express Maximum Database Size Limitation for Veeam Backup & Replication

Veeam Backup & Replication 12 Feature Starting with Veeam Backup & Replication 12, all new deployments will use PostgreSQL as the default database engine to host the configuration database. PostgreSQL does not have the limitations discussed in this article. Existing deployments upgraded from Veea...

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 &...

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...

How to disable TLS 1.0 with no impact on Veeam ONE functionality

Possible Veeam ONE issues with disabling TLS 1.0 protocol and their resolution plans...

Error “Unexpected VHD Feature Mask ‘6’” on Hyper-V backup or replication job

Challenge The feature mask 6 error is Hyper-V specific. This KB covers that error and how to resolve it. Cause Feature mask 6 errors most often occur when a Hyper-V VM was a Physical to Virtual conversion using third party software. The issue is that some third party converter software creates th...

Onboarding a Microsoft 365 Organization Fails with: service principal name is already present for the tenant

Challenge When signing in with a device code during onboarding of a Microsoft 365 organization in Veeam Data Cloud for Microsoft 365 , the following error occurs: AADSTS650051: Consent action for Application '' failed due to following error: The service principal name is already present for the...

"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 Connect to an Object Storage Repository via AWS Privatelink / Direct Connect

Purpose This article documents the configuration of Veeam Backup & Replication for using AWS PrivateLink or AWS Direct Connect. These services enable the following connections without the use of public endpoints: Scale-Out Backup Repository offload to Capacity Tier or Archive Tier Backup and Back...

VMware vCenter Server rescan failed with “Could not create SSL/TLS secure channel” error

Article Applicability This article is relevant only to Veeam Backup & Replication 12.x and older because it is strictly related to an issue that affects Windows OSes that were dropped from support starting in Veeam Backup & Replication 13. This article is related only to issues that occur when...

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...

How to Forcibly Stop Stuck Jobs

Notice of Future Change This article may be retired in the future. As the product has matured, the incidence of jobs or tasks becoming "stuck" has decreased significantly. However, there are instances where a job might be executing a background task, giving the appearance that it has become stuck...

VSSControl: -2147024784 / 0x80070070: There is not enough space on disk

Challenge A job with Guest Processing enabled fails with either: VSSControl: -2147024784 Backup job failed. Cannot create a shadow copy of the volumes containing writer's data. Cannot prepare the Exchange server data to a subsequent restore operation. Cannot store backup/restore manifest. Serial...

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...

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...

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...

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:...