Veeam Backup Veem Update Version v8.5

Veeam Backup for Microsoft 365 v8.5 adds new PowerShell cmdlets to remediate object storage data affected by KB4835 and supports Microsoft Exchange Server Subscription Edition. It also improves SharePoint and Exchange backup performance and preserves SharePoint site permissions when restoring within the same Microsoft 365 organization. Reference IDs: KB4874, KB4820.

• Added new PowerShell cmdlets to remediate data stored in object storage repositories and affected by the issue described in KB4835.

• Improved SharePoint backup and object storage repository performance, including asynchronous list content retrieval and file cache operations.
• Improved Exchange backup performance for large mailboxes and reduced backup duration by parallelizing sync and repository write operations.
• Reduced memory usage and improved backup job performance for repositories containing SharePoint data.
• Optimized SharePoint backup for large sites by improving internal database query performance and job throughput.
• Optimized object storage consumption metric updates during backup jobs and retention tasks to reduce PostgreSQL load.
• Optimized processing of backup job and restore session events to prevent uncontrolled growth of the NATS controller stream.

• Support for Microsoft Exchange Server Subscription Edition.
• SharePoint site permissions and members are preserved when restoring a site to another location within the same Microsoft 365 organization, using REST API only.
• Microsoft Teams channel messages are now referred to as "posts" instead of "chats" in the product UI and documentation.
• New PowerShell cmdlets for remediating object storage repositories affected by KB4835.

• Upgrades from Veeam Backup for Microsoft 365 v7 and v7a to v8.5 are not supported.
• Upgrade from beta and technical preview versions of Veeam Backup for Microsoft 365 v8 is not supported.
• Support for NAS SMB shares as backup targets is planned for deprecation in future releases.
• Support for Microsoft 365 Germany region and Azure Blob Storage Germany region is deprecated or planned for deprecation.
• Support for modern authentication that allows legacy auth protocols is deprecated.

• Starting from v8.5, additional Microsoft Graph permissions are required for backup app registrations in Microsoft Entra ID to support Exchange mailbox protection after EWS retirement; see KB4820.
• If upgrading from the public technical preview, remove remote backup proxies, uninstall pre-release components, and manually delete pre-release repositories, databases, NATS streams, and the C:\ProgramData\Veeam\Backup365 directory.
• Veeam Backup for Microsoft 365 v8.5 supports upgrades from v8, v8.1, v8.2, v8.3, and v8.4 builds listed in the release notes.
• If the REST API component is installed on a separate host, it must be upgraded manually after upgrading the main product.
• The release version is available for download starting from June 29, 2026.

• Download page
  https://www.veeam.com/products/saas/backup-microsoft-office-365-download.html
• Product page
  https://www.veeam.com/products/saas/backup-microsoft-office-365.html

Product Information

Vendor: Veeam Backup

Product: Veem

Product type: Other

Platform: Windows

Version: v8.5

Vendor release date: Jul 29, 2026

Original release notes: View on vendor site

Published on updatealert.io: Jul 31, 2026

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