Veeam Backup Veem Update Version Veeam Agent for Microsoft Windows 13.1.2.812; Veeam Backup & Rep

Veeam Agent for Microsoft Windows 13.1.2.812 is documented alongside Veeam Backup & Replication 13.1. The notes include Windows installation requirements, upgrade prerequisites, compatibility changes, deprecations, and known limitations.

• NTLM authentication is deprecated in Windows-based installations and discontinued in the Veeam Software Appliance; use Kerberos or deploy the Veeam Deployment Kit where Kerberos is unavailable.
• Configuration backups should use encryption so stored credentials and other sensitive information are included securely.
• Microsoft Smart App Control must be disabled because it blocks Veeam Agent installation.
• Certain antivirus products can interfere with setup or file-level recovery; temporarily disable them during installation and exclude Veeam Agent services and application folders from real-time monitoring.
• SSH private keys generated with DSA are no longer supported.

• Veeam Agent for Windows backup jobs may fail with a VSS asynchronous-operation error when file-level recovery runs simultaneously.
• Backup jobs cannot wake computers from sleep or detect missed backups on Connected Standby or Modern Standby mobile devices.
• Encrypted files and folders are skipped during file-level backup with an Access Denied error; use volume-level backup instead.
• Backup jobs targeting Amazon S3 buckets in the US or Canada fail if the bucket name contains a period.
• Restore to the original location through Veeam Enterprise Manager may fail when the computer and Enterprise Manager server belong to different domains.
• During Remote Bare Metal Recovery, BitLocker-encrypted volumes cannot be manually unlocked with Custom Mapping.
• The VeeamVolumeCT driver does not support Microsoft Windows BypassIO, so protected volumes continue using the standard I/O path.
• Installation on Windows may fail with Turkish or other non-ASCII locales because of PostgreSQL locale handling.
• Windows File Level Restore requires a Windows mount server for backed-up ReFS volumes.
• Storage Spaces volumes are not supported for file-level recovery.
• File-level restore over PowerShell Direct fails when the source VM has a backup job with Use Persistent Guest Agent enabled.

• Veeam Backup & Replication 13.1 supports an automated in-place upgrade from version 12.3.1 build 12.3.1.1139 or later; earlier upgrades require Veeam Support.
• Before upgrading, complete jobs, disable periodic and Backup Copy jobs, disable CDP policies, ensure no active restore or agent tasks remain, and create an encrypted configuration backup.
• Port 443 must be available before upgrading because it is required by the Web UI; port 6162 is also required when upgrading from version 12.
• The Veeam PowerShell module requires PowerShell 7; scheduled scripts should call pwsh.exe instead of powershell.exe.
• The legacy registry-based Agent UI customization mechanism is deprecated starting with version 13.1; use Agent UI Branding and Customization.
• Agents for Microsoft Windows or Linux below version 6.3.1 stop working after the backup server is upgraded to 13.1. Upgrade them to 13.1 or later.
• Migration from a Windows installation to the Veeam Software Appliance is not supported in 13.1; remain on the latest 13.0 patch and contact Veeam Support.
• Updates and hot-fix installation automatically restart services; schedule maintenance accordingly.
• After upgrading, backup server performance may be reduced for up to an hour while the configuration database is optimized.
• The Veeam Backup & Replication 13.1 release became available for download on July 29, 2026.

Product Information

Vendor: Veeam Backup

Product: Veem

Product type: Other

Platform: Windows

Version: Veeam Agent for Microsoft Windows 13.1.2.812; Veeam Backup & Rep

Vendor information published: Oct 27, 2026

Original release notes: View on vendor site

Published on updatealert.io: Oct 30, 2026

Description: Backup and recovery software for virtual, physical, and cloud workloads.