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...

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,...

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...

How to Configure PXE Booting of Veeam Agent for Linux Recovery Media

Veeam Agent for Linux Version Requirement Starting with Veeam Agent for Linux 6.1.2, the Veeam Recovery Media is designed to be capable of use in PXE booting.veeam-recovery iso released after 22-May-2024 Purpose This article documents how to configure Linux to PXE boot the Veeam Agent for Linux...

Veeam Agent for Microsoft Windows Built-In Case Creation fails with "The request was aborted: Could not create SSL/TLS secure channel"

Article Applicability This article is regarding an issue that impacts Veeam Agent for Microsoft Windows build 5.0.0.4301 or older, and was fixed in build 5.0.1.4584. Challenge When attempting to open a support case using the Technical Support button within the Veeam Agent for Microsoft Windows...

Download and Manage VCSP Licenses On The Pulse Portal

Purpose Accessing and managing the hosting rental Veeam Cloud & Service Provider licenses on the VCSP Pulse self-service portal. VCSP Pulse is an automated platform where the Service Providers can generate, edit, manage, and download rental licenses directly. The platform represents a collaborati...

How to Create Secure IAM Policy for Connection to S3 Object Storage

Article Applicability This KB article is relevant only to Veeam Backup & Replication 12.0.x and older. Starting with Veeam Backup & Replication 12.1 released in December 2023, permissions requirements are now documented within the product user guide: Veeam Backup & Replication - Amazon S3 Object...

Job to the Linux Repository Fails with "No connection could be made because the target machine actively refused it xx.xx.xx.xx:2500"

Challenge When multiple tasks are attempting to use the same Linux repository simultaneously, some connections may fail with the error: No connection could be made because the target machine actively refused it xx.xx.xx.xx:2500. The port shown in the error is a data transmission port, and may be...

How to configure Email Notifications when using Gmail or Google Apps Mail in Veeam ONE

Challenge You need to configure email notifications to be sent to a Gmail or Google Apps Mail account in Veeam ONE. Cause Use of port 587 is required for TLS when communicating with Gmail or Google Apps Mail. Solution Set the Port to 587 in Veeam ONE console Options Server Settings SMTP Settings...

Job Fails to Start Due to Timeout Caused by Desktop Heap Allocation Failure

Article Applicability The timeout error displayed in Veeam Backup & Replication can be caused by various factors. This article explicitly addresses a scenario where the Windows OS experiences a 'heap allocation' failure. Please note that the solution provided in this article is only applicable if...

How to Install, Change, or Remove the Veeam ONE License

Purpose This article documents how to manually install, change, or remove a license for Veeam ONE. Solution Install License 1. Open Veeam ONE Client. 2. Click the Main Menu ≡ in the top-left corner. 3. Click License. 4. In the dialog window that appears, click Install License. 5. Using the file...

How to Create a Custom SureBackup Test Script

Purpose This article provides information about creating custom SureBackup roles and scripts which can be used to enhance SureBackup testing. Solution Information regarding custom SureBackup roles can be found here: https://helpcenter.veeam.com/docs/backup/vsphere/creatingxmlfiles.html Informatio...

The dependency service or group failed to start

Challenge Cause This error is usually caused by one or more Windows VSS services being disabled. To fix it, you will need to go to Start Run, and enter "services.msc" without quotes. Here, you will see a list of services, their description, and whether or not they are running. Make sure RPC servi...

Appliance Mode (Hotadd) Requirements and Troubleshooting

Requirements Virtual Appliance HOTADD Requirements and Limitations Requirements for Backup and Restore of Encrypted VMs Known Issues If the VM disk resides on a vVol, the Veeam VMware Backup Proxy's VM configuration file vmx must be on the same vVol. The Veeam VMware Backup Proxy VM must be locat...

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...

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...

Uninstall or Upgrade of Veeam Agent for Microsoft Windows Fails Due to Missing MSI

Challenge When attempting to uninstall or upgrade Veeam Agent for Microsoft Windows , the Windows dialog box appears stating: The feature you are trying to use is on a network resource that is unavailable. Click OK to try again, or enter an alternate path to a folder containing the installation...

How to use Veeam Backup for Nutanix AHV/Veeam Backup for Red Hat Virtualization Proxy with Internal CA Certificates

Article Applicability The need to perform the procedures documented in this article has been eliminated through improvements to how certificates are handled, starting in the following versions: Veeam Backup for Nutanix AHV 5 Veeam Backup for Oracle Linux Virtualization Manager and Red Hat...

Error When Adding Veeam Backup for Microsoft 365 to Veeam ONE

Challenge When attempting to add Veeam Backup for Microsoft 365 to Veeam ONE, either of the following error occurs: Failed to connect to "localhost".404 Not Found Failed to add the Veeam Backup for Microsoft 365 server. The server version is not supported. Cause Both errors occur for the same...

Cloud Connect replication fails with "The following hosts are incompatible with the target host"

Challenge An attempt to start or create a Cloud Connect replication job fails with the error message: " The following hosts are incompatible with the target host". Cause The following scenarios are known to cause the issue: 1. Tenant's Veeam installation had been updated to the latest version 9.5...

Tape job fails with “The specified network resource or device is no longer available” or “The system cannot find the file specified. Problem with CreateFile in '\\.\Tape0'”

Challenge Tape job fails with the following error messages: The system cannot find the file specified. Problem with CreateFile in '\.\Tape0'. The system cannot find the file specified. The system cannot find the path specified. The specified network name is no longer available. Copy Cause The...

How to Manually Recreate the Veeam ONE Database

Purpose This article documents how to manually create a new Veeam ONE database. Solution 1. Follow the steps for Creating Veeam ONE Database with SQL Script in the Veeam ONE User Guide. The link in this step will direct you to the most recent Veeam ONE version's user guide. If you are rebuilding...

Appliance Mode (Hotadd) isn't available if proxy VM and its replica are running under the same vCenter

Challenge A VMware Backup Proxy is not processing VMs using Virtual Appliance HOTADD mode, despite meeting all requirements. Cause Veeam Backup & Replication uses VDDK to communicate with VMware infrastructure. Starting with VDDK 6.0, VMware added additional logic to validate possible transport...

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...

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...

Win32 error: The network path was not found. Code 53

Challenge A server processed by a job fails with the following error: Error: Failed to connect to guest agent. Errors: 'Cannot connect to the host's administrative share. Host: . Account: .... Win32 error:The network path was not found. Code: 53 Cannot connect to the host's administrative share...

How to Start a SureBackup Job in Troubleshooting Mode

Purpose This article documents how to start an individual VM that has failed SureBackup validation in "Troubleshooting mode." Solution Troubleshooting Mode causes the selected VM in the SureBackup job to be powered on and remains on, despite possible test failures. This can be very useful for...

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...

Failed to start client agent on the host

Backup job fails with the error: 'Failed to start client agent on the host '...', Timeout to start agent'...

Unable to Generate Reports Due to Error “Veeam ONE Caching Service Maintenance”

Challenge When attempting to generate reports in Veeam ONE the report fails to load and instead for following error is displayed: Veeam ONE Caching Service Maintenance The caching service database is being prepared for the maintenance window. Often, when this error is shown, the following error...

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...

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...

Using Veeam Agents with HPE VM Essentials

Article Aplicability This article was created before the release of the Veeam Plug-In for HPE Morpheus VM Essentials. Its content reflects an alternative solution that was available before the direct integration of HPE Morpheus VM Essentials management as a virtual environment in Veeam Backup &...

Veeam Backup for AWS Private Network Deployment Automation

Purpose This article provides information about Veeam Backup for AWS support for private deployment mode. It will explain how to use the attached script to configure network settings for buckets used as repositories and workers used for backups. To learn more about implementing Private Deployment...

How to Change Veeam Service Provider Console UI Language

Veeam Service Provider Console 9.1 Integrated Feature Starting with Veeam Service Provider Console 9.1, the ability to assign and customize the Portal Language is now an integrated feature able to be configured via the Web UI: Veeam Service Provider Console 9.1 - Configuring Portal Language Artic...

Increase in API Calls when Performing Direct Backups to Immutable Object Storage

Article Applicability This article was created to address high API usage observed with Veeam Backup & Replication 12.x. Starting in Veeam Backup & Replication 13, improvements were made to the handling of immutability-related API calls, which will significantly reduce the number of API calls that...

CANNOT_EXECUTE_FLOW_TRIGGER. You or your organization has exceeded the maximum limit for this feature.

Challenge When performing a restore involving multiple records, one or more records fail to be restored with the following Salesforce error message: CANNOTEXECUTEFLOWTRIGGER. You or your organization has exceeded the maximum limit for this feature. Error ID: XXX-XXX XXX organization has exceeded...

“Failed to resolve team (ID: , name: ): Organization (ID: ) which the team (ID: ) belongs to not found” when performing Microsoft Teams backup

Update:January 2024 There have been several reported instances where, under specific circumstances, the issue discussed in this article has occurred while running Veeam Backup for Microsoft 365 6.x. All customers are encouraged to upgrade to the latest version of Veeam Backup for Microsoft 365 at...

"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 configure antivirus configuration XML file for secure restore

Challenge The article provides information on adding additional antivirus options to Veeam Backup & Replication Secure Restore. NOTE : When adding an antivirus that is not already predefined, you may need to contact the antivirus vendor for assistance to gather the required attributes and exit...

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...

Veeam Backup & Replication fails to connect to Linux server with an error about negotiation

Challenge When attempting to add a managed Linux server or edit a Linux repository one of the following errors occurs: Negotiation failed. The client and the server have no common key exchange algorithm. Copy Negotiation failed. The client and the server have no common encryption algorithm. Copy...

Your backup administrator chose not to enable this functionality.

Challenge In the process of importing encrypted backup files for which you do not have the password, attempting to use the "I have lost the password" feature produces the error: Your backup administrator chose not to enable this functionality. Cause This occurs because the backup file was created...

SureBackup fails: Failed to call RPC function - Access is Denied

Challenge When the Veeam vPower NFS Service on the Mount Server used by the SureBackup job is set to use any account other than Local SystemThe default configuration is for the Veeam vPower NFS Service to "Log On As" the 'Local System' account., and that account is not a member of the Local...

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...

Veeam ONE Upgrade Fails with "Win32 exception occurred while executing SQL script."

Challenge When upgrading Veeam ONE from version 12.3 to version 13, the following error occurs: Win32 exception occurred while executing SQL script. Error code: 0x80004004. Error details: The SELECT permission was denied on the object 'sysjobs', database 'msdb', schema 'dbo'. Cause This error...

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...

Could not apply snapshot: Device has active dirty bitmaps

Challenge When the user attempts to use the Rollback function for a snapshot on a Proxmox Virtual Environment PVE Virtual Machine VM that is protected by Veeam Backup & Replication, the following error occurs: qemu-img: Could not apply snapshot '%%': Device has active dirty bitmaps Cause This err...

"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...

How to Collect Process Dumps and Logs

Article Applicability This article was created to complement KB1727 and provide customers with specific instructions to collect information that will: Help Veam Support identify if the job or task is actually stuck or if it is working on something in the background. Help the Development team...