Windows File Level Restore hangs on "Starting restore session"

Challenge Windows File Level Restore hangs on "Starting restore session" for abnormally long period of time while free disk space on drive C:\ keeps decreasing dramatically on the machine where the Veeam Backup & Replication Console is launched. You may that find the following location of the cac...

How to Move the VBRCatalog Folder

Purpose This article documents the procedure for moving the VBRCatalog folder on Veeam Backup & Replication and Veeam Backup Enterprise Manager servers. Solution VBRCatalog Location Requirements The VBRCatalog folder must be on the root of a given drive letter. Example: C:\VBRCatalog\ or...

How to Configure Advanced Syslog Integration Options

Purpose This article documents advanced configuration options for syslog integration with Veeam Backup & Replication, a new feature starting in version 12.1. Solution The following advanced configuration options are available: Add BOM Before MSG Field Add the Unicode byte order mask BOM before th...

Replication job fails with "Cannot replicate disk because its capacity was reduced"

Challenge After a VM's disks have been resized to be smaller, the Replication job within Veeam Backup & Replication fails with the following error: Processing Error: Cannot replicate disk Datastore vmfolder/vmname.vmdk because its capacity was reduced Copy Cause This error occurs when Veeam Backu...

How to Remove Missing Restore Points From Veeam Cloud Connect Backups

Purpose This article documents how to handle a situation in which the tenant of a Cloud Provider needs to forget missing restore points from a backup chain stored in a Cloud Repository. By design, the Forget and Remove operations are not available for restore points in a Cloud Repository. A resto...

How to Review Password Requirements of Veeam Software Appliance

Purpose This article documents how to review the specific password requirements for a Veeam Software Appliance. Solution The Veeam Software Appliance adopts the DISA STIG password requirement standard. These password requirements may change between releases and as part of OS updates. View Current...

How to Add Exclusions to Veeam Threat Hunter Scan

Purpose This article documents how to exclude files from the Veeam Threat Hunter scan. Solution To exclude specific files or folders from Veeam Threat Hunter scans, add a registry entry on your Veeam Backup Server: Registry Path: HKLM\SOFTWARE\Veeam\Veeam Threat Hunter\ Value Name:...

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...

Veeam.Archiver.Service terminates due to 'System.OutOfMemoryException' after updating to Veeam Backup for Microsoft 365 7.0.0.3968

Challenge Veeam.Archiver.Service consumes all available virtual memory and then terminates. The issue can be confirmed with the following Windows Events System log: The Veeam Backup for Microsoft 365 Service service terminated unexpectedly. It has done this 1 times. The following corrective actio...

What Microsoft's EWS Retirement Means for Your Veeam Backups

Updated September 2026 This article has been revised to reflect: Microsoft's October 1, 2026 enforcement timeline. The introduction of the EWSAllowedAppIDs allow list. The current status of Veeam's transition to Microsoft Graph. Customers who have previously read this article are advised to revie...

How to Reset Worker Root Password

Article Applicability Due to security changes in Veeam Backup & Replication 13.1 to make all workers DISA STIG compliant, the procedure in this article can no longer be used. Please do not follow the instructions in this article for workers included with Veeam Backup & Replication 13.1 or later, ...

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:...

"Failed to convert [Not Settable] to UUID."

Challenge Veeam Backup & Replication task interacting with Proxmox VE host fails with: Failed to convert Not Settable to UUID Cause This occurs when the Proxmox VE host has an empty bios UUID, or the reported bios UUID value is unparsable. Solution 1. Remove workers if any from the Veeam Backup &...

How to Change Initial Management Port for Veeam Plug-ins for Enterprise Applications

Purpose This article documents how to change the default port used by the Plugin Manager 6791 for Veeam Plug-ins for Enterprise Applications: Veeam Plug-in for SAP HANA Veeam Plug-in for Oracle RMAN Veeam Plug-in for SAP on Oracle Veeam Plug-in for Microsoft SQL Server Veeam Plug-in for IBM Db2...

All Aliases Have Failed

Challenge A Tenant's Backup Job or Backup Copy Job targeting a Cloud Repository fails with the following message: Target gate has rejected connection. Unable to establish target connection. All aliases have failed. The wording of the error might differ, but the root error "All Aliases Have Failed...

Vulnerabilities Resolved in Veeam Backup & Replication 13.0.2

All vulnerabilities documented in this article were resolved in Veeam Backup & Replication 13.0.2.29. 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 V...

CVE-2023-27532

Article Applicability This article documents a vulnerability discovered in a core service of Veeam Backup & Replication and Veeam Cloud Connect. This vulnerability does not affect other Veeam products e.g., Veeam Backup for Microsoft 365, Veeam Agent for Microsoft Windows , Veeam ONE, Veeam Servi...

Cannot Register Management Service. The Specified Service Has Been Marked for Deletion.

Challenge A Backup or Replication job using Application-Aware Processing fails with an error similar to: Failed to prepare VM for processing: Unable to perform installation Unable to register and start service. Attempt 10 of 10 Cannot register management service. Service name: VeeamVssSupport...

Failed to install Veeam Analytics Service. Failed to establish connection between the Veeam ONE server and Veeam Analytics service. Operation timed out: 10

Challenge After upgrading Veeam ONE to version 13.0.x, the Veeam Analytics Service installation fails with the following error: Failed to install Veeam Analytics Service. Failed to establish connection between the Veeam ONE server and Veeam Analytics service. Operation timed out: 10. The failure...

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-...

"Proxy offline time exceeded” error after updating Veeam Backup for Microsoft 365 to version 4c

Challenge After updating Veeam Backup for Microsoft 365 4c build 4.0.1.531 backups start to fail with the "Proxy offline time exceeded". Cause At the end of every month, Veeam Backup for Microsoft 365 collects licensing information. If your Veeam Backup for Microsoft 365 server is installed on a...

How to Attach Files to a Veeam Support Case

Purpose This article documents how to attach files to a Veeam Support case. Methods Below are the two methods portal or SFTP used to attach files to a support case. Expand a section to learn more. Attach files to the Support case via the My Account portal. 1. Sign In to the My Account portal. 2...

Release Information for Huawei Plug-In for Veeam Backup & Replication

Huawei Plug-In - End of Life The Huawei Plug-In for Veeam Backup & Replication reached End-of-Life on 2022-04-22 and is no longer available. Requirements Before installing Huawei Plug-In v1.0.23, ensure that you are running Veeam Backup & Replication 10.0.0.4461 or later. To check the version, op...

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 Agent for Microsoft Windows 13.0.1.120 to 13.0.1.1009 Upgrade Notes

Article Applicability This article documents notable deviations from the standard Veeam Agent for Microsoft Windows upgrade procedure that occur only when upgrading from Veeam Backup & Replication VBR 13.0.1 build 13.0.1.180 to 13.0.1 Patch 1 build 13.0.1.1071. This patch to VBR includes a new...

Veeam Service Provider Console fails to connect to restored VSPC database due to collation conflict

Challenge When attempting to connect Veeam Service Provider Console to an existing VSPC database the following error occurs: Implicit conversion of varchar value to varchar cannot be performed because the collation of the value is unresolved due to a collation conflict between "" and "" in add...

Backup Job fails with "This functionality requires using paid Veeam Agent edition" error or Agents discovery session fails with "Remote deployment and management is available for licensed agents only" Error.

Challenge The following error appears during the backup job session, then the backup job fails: This functionality requires using paid Veeam Agent edition. The following error appears during the Agents Discovery session, then the task fails: Remote deployment and management is available for...

Veeam Backup & Replication 13: Changes to Supported Linux Platforms

Article Applicability This article lists the specific Linux distributions and versions that will no longer be supported starting with Veeam Backup & Replication and Veeam Agent for Linux version 13. These lists are intended for customers currently running Veeam Backup & Replication 12.3 and Veeam...

Veeam Backup & Replication 11a P20220302/P20230227 Compatibility With vSphere 8.0

Full support for vSphere 8.0 is available starting with Veeam Backup & Replication 12. See KB2443: Veeam Backup & Replication support for VMware vSphere Support Statement Veeam's RnD team has performed extensive testing with Veeam Backup & Replication 11a P20220302/P20230227 and has determined th...

How to Change the Settings Related to Veeam Backup & Replication Log Files

Purpose This article documents how to change settings regarding where log files are stored, how large an individual log file may become, and how many generations of log files are retained. Solution Log Files Stored on the Veeam Backup Server The following registry values must be created on the...

Processing configuration Error: The operation is not allowed in the current state. (The VM is in invalid state.)

Article Applicability This article's core error message, "The operation is not allowed in the current state. " may occur during other stages of a replication job or for different job types. This article, KB3000, is specific to when the error occurs during the Processing configuration stage of a...

Restore or Failback to Server 2022 Hyper-V host fails with "Unable to update VM security descriptor Error"

Article Applicability This article is specific to an error that occurs when attempting to restore or failback to a Hyper-V host running Windows Server 2022 or versions 2004 and 20H2 of the Semi-Annual Channel versions of Windows Server. This article addresses an issue that is mentioned in the Vee...

Veeam Backup Enterprise Manager Vulnerabilities (CVE-2024-29849, CVE-2024-29850, CVE-2024-29851, CVE-2024-29852)

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...

Archiving Job Fails With: "Failed to provision a proxy appliance : Unable to connect by SSH to Appliance."

Challenge An Archiving Job for a Scale-Out Backup Repository fails with the error: Failed to provision a proxy appliance: Unable to connect by SSH to Appliance. Copy Log Example dd.mm.yyyy hh:mm:ss Warning Failed to provision a proxy appliance: Unable to connect by SSH to appliance. dd.mm.yyyy...

Tape job does not copy source backup files and finishes with "No backup files found"/"No new files found" message

Challenge A tape job finishes with the Success status, but the backup files of a source jobs are not copied. In the tape job statistics, you can find the "No backup files found"/"No new files found" message. Cause Case 1: • The source job is a backup copy job. • At the Choose Media Pool for Full...

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 ...

Build Numbers and Versions of Veeam Agent for Linux

This KB article lists all versions of Veeam Agent for Linux and their respective build numbers. For more information on downloading the latest version of Veeam Agent for Linux , visit: Veeam Agent for Linux -- Current Version Download Page Veeam Agent for Linux -- What's New Latest Version Versio...

Troubleshooting vPower NFS Datastore Mounting Issues

Challenge During SureBackup, Instant Recovery, Instant Disk Recovery, or Other-OS FLR operation, the following error is seen in the VMware environment: Error during the configuration of the host: NFS Error: Unable to Mount filesystem: Unable to connect to NFS server. or An error occurred during...

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...

Access to Hyper-V or Veeam B&R Components Fails After DCOM Hardening is Enabled

Article Applicability The issue discussed in this article is not identified solely based on the Veeam errors but rather by their correlation with Windows Event ID 10036, which states: The server-side authentication level policy does not allow the user from address to activate DCOM server. Please...

License Update Fails In Networks Where HTTP Proxy Must Be Used

Challenge License updating may fail if the machine where the Veeam software is installed does not have a direct connection to the Internet and must instead connect to the Internet via an HTTP proxy. For example, when this occurs with Veeam Backup & Replication, the Svc.VeeamBackup.log shows eithe...

Veeam Best Practices regarding CVE-2021-36934

Challenge This article documents Veeam's position on Windows Elevation of Privilege Vulnerability CVE-2021-36934. Specifically regarding the listed mitigation steps involving removal of all shadow copies, and the "Impact of workaround" mentioned in the Workarounds section of CVE-2021-36934...

Release Information for Veeam Backup for Microsoft 365 8.5

More Recent Version Available Please find the latest version of Veeam Backup for Microsoft 365 here: Veeam Downloads - Latest Version Build Numbers and Versions of Veeam Backup for Microsoft 365 Requirements This release can be used to: upgrade an existing v8, v8.1, v8.2, v8.3, or v8.4 deployment...

Replication Error: The name '{vmname}' already exists.

Challenge Veeam Backup & Replication replication job fails with the following error message: Processing Error: The name 'replica' already exists. When the error above occurs within Veeam Backup & Replication the following correlating event can be found within the vSphere Events. Cause This error...

Veeam Service Fails to Start with Error 1920

Challenge A service relating to Veeam Backup & Replication fails to start and displays the message: Error 1920. Service failed to start. Verify that you have sufficient privileges to start system services. Copy Solution Common Causes The service is set to run as an account other than Local System...

Release Information for IBM FlashSystem 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 IBM FlashSystem Plug-In v2.4.2, ensure that you are running at least Veeam Backup &...

REST API Error: S3 Error: The difference between the request time and the current time is too large / Invalid Credentials for Amazon S3

Challenge This article covers two different errors that occur when performing different tasks, but have the same root cause: When adding S3 Object Storage to Veeam Console, Veeam displays the follow error: Failed to list S3 buckets: check if the specified account has required permissions REST API...

How to Change Veeam Service Provider Console Website Port

Purpose This article documents how to change the port used by the Veeam Service Provider Console Portal. Solution Note: The Veeam Service Provider Console software was previously known as Veeam Availability Console. The old name is still used in some locations for backward compatibility, in...

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...

"Windows Script Host must be enabled for the duration of setup process"

Challenge While attempting to Install or Upgrade Veeam Backup & Replication, the installer displays the message: Windows Script Host must be enabled for the duration of setup process, Refer to KB4699 for more information https:// www.veeam.com/kb4699. Cause This message is displayed when the...