Exchange backup fails after upgrading to Veeam Backup for Microsoft 365 v5

Challenge After upgrading Veeam Backup for Microsoft 365 to v5, backup of Exchange Online data may fail with " Unauthorized 401" error. The issue affects organizations using Modern authentication and legacy protocols with application secret. Cause Starting v5 Veeam Backup for Microsoft 365 has...

VeeamCDP I/O filter cannot be installed "Error: the operation is not allowed in the current state"

Challenge The installation of the Veeam CDP I/O Filter fails during deployment with the following error: Error Installing VeeamCDP components on cluster: ... Error: the operation is not allowed in the current state Error Failed to install VeeamCDP I/O filters: Failed to install VeeamCDP I/O...

Linux Guest File Restore Cannot Connect Backup Datastore to ESXi Host

Challenge While performing a Guest Files restore for "Linux and other..." the restore operation fails with the following error: Failed to mount restore point. Linux FLR appliance deploy failed Failed to connect backup datastore to the ESXi host Failed to add NFS datastore for NFS host, Failed to...

Upgrading/Uninstalling Veeam Backup & Replication fails with "Error 1327. Invalid Drive: [a-z]:\" or "Warning 1327. Invalid Drive [a-z]:\"

Challenge While upgrading or uninstalling Veeam Backup & Replication, the installer stops and displays either of the following messages: Warning 1327. Invalid Drive: F:\ Copy Error 1327. Invalid Drive: F:\ Copy Note: The drive letter in the message may be any drive letter. Cause The settings in t...

Veeam Plug-In for Oracle RMAN Cumulative Patch P20210507

Challenge A backup using the RMAN plug-in fails with the following error: ORA-19511: non RMAN, but media manager or vendor specific failure, error text: Operation is terminated. Copy Cause The failures can happen due to desynchronization between different threads started in different backup...

Veeam Service Provider Console v5 Patch 3

This patch has been superseded by Veeam Service Provider Console v5 Patch 4. Requirements Please confirm you are running version 5.0.0.6726 or later before installing Patch 3. You can check this by logging in to the backup portal and navigating to the Configuration Support Information tab. After...

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...

Veeam Backup for Microsoft 365 5b cumulative patch KB4158

This update has been superseded by Veeam Backup for Microsoft 365 5с Requirements Please confirm you are running Veeam Backup for Microsoft 365 build 5.0.1.179, 5.0.1.207, or 5.0.1.225 prior to installing this cumulative patch KB4158. You can check this under Help and Support About in Veeam Backu...

Veeam My Account Sign In FAQ

Below are the most commonly asked questions. Click to expand Which email should I use to log in to the Veeam My Account Portal? You should use your email associated with the company you work with. If you have worked with Veeam Support before, search through your email client to see which email...

How to Configure Connections Required for Veeam Backup for Google Cloud in Highly Secured Environments

If your backup appliance is deployed in a highly secured environment with all outbound connections restricted, you must perform the following configuration steps to make Veeam Backup for Google Cloud function properly: 1. Allow internet access to the following Google Cloud APIs: Compute Engine AP...

"The remote server returned an error: (403) Forbidden. Access denied" when performing Veeam Backup for Office 365 backup

Challenge Backup and restore operations in Veeam Backup for Microsoft 365 fail with the error: The remote server returned an error: 403 Forbidden. Access denied Impacted Configurations Backup operations for Veeam Backup for Microsoft 365 deployments with Organizations using these authentication...

Veeam CDP service does not start after the installation of the storage integration plug-in

Challenge Certain primary storage integration plug-in setup programs leave the Veeam Continuous Data Protection Veeam CDP service stopped after the installation. The following plug-ins are affected: Dell EMC SC Compellent Plug-In for Veeam Backup & Replication Tintri IntelliFlash Plug-In for Veea...

The provided client secret keys are expired.

Challenge Veeam Backup for Microsoft 365 displays one of the following errors: The provided client secret keys are expired. Copy Error: AADSTS7000222: The provided client secret keys are expired. Visit the Azure Portal to create new keys for your app, or consider using certificate credentials for...

How to uninstall Veeam CDP VAIO filter driver manually

Article Applicability This article documents the manual filter driver removal process. If Veeam Backup & Replication is available, the recommended method for uninstalling the I/O Filter is documented in the user guide. Veeam Backup & Replication - Updating and Uninstalling I/O Filter Objective Th...

GPG error: The following signatures were invalid: KEYEXPIRED

End-of-Life Product Nutanix Mine with Veeam reached End-of-Life on 2026-04-30. As of this date, all support services for this product are unavailable. For more information, see the Nutanix EOL Announcement Bulletin - Nutanix Mine, released 2025-04-30. Challenge For the products of specific versio...

Veeam Agent for Microsoft Windows Installation fails with "Error 1920.Service Veeam Agent for Microsoft Windows (VeeamEndpointBackupSvc) failed to start" on Windows Server 2012 R2/8.1

Veeam Support Knowledge Base answer to: Veeam Agent for Microsoft Windows Installation fails with "Error 1920.Service Veeam Agent for Microsoft Windows VeeamEndpointBackupSvc failed to start" on Windows Server 2012 R2/8.1...

Veeam Backup for Nutanix AHV possible backup corruption

Challenge Due to a known issue in rare cases Veeam Backup for Nutanix backups might get corrupted. Cause The issue appears on data read by libaio when memory is aligned by 512 bytes but not aligned by 4096 bytes. The issue can affect full backups as well as incremental ones. Solution The issue is...

Granular AWS Account Permissions for Adding an S3 Repository

This article documents the granular permissions required to add an S3 repository to Veeam Backup for AWS...

AWS User Account Permissions for Deployment of Veeam Backup for AWS Appliance

This article documents the granular permissions needed for deploying a new Veeam Backup for AWS appliance...

Granular AWS Account Permissions for Connection to and Upgrading of Veeam Backup for AWS Appliance

This article documents the granular permissions needed for connecting to an existing Veeam Backup for AWS appliance...