Upgrading Veeam Backup for Microsoft 365 - From 8.3.0.2201 Ver to Ver 8.4.0.1457
Upgrading Veeam Backup for Microsoft 365 - From 8.3.0.2201 Ver to Ver 8.4.0.1457
+1+1Veeam M365 Version Upgrade Guide – Step by Step
Introduction
Upgrading Veeam Backup for Microsoft 365 is important to keep your environment secure, stable, and compatible with the latest Microsoft 365 services. In this guide, we will walk through the complete step-by-step process to upgrade Veeam M365 safely and smoothly.
Before You Start
Check Current Version
Open the Veeam Backup for Microsoft 365 Console and verify your current build version.
Navigate to:
Help → About
Download Latest Version
Download the latest ISO or setup package from the official Veeam website:
Pre-Upgrade Checklist
Before starting the upgrade, complete the following checks:
- Take configuration backup
- Verify repository health
- Stop running backup jobs
- Ensure enough disk space
- Check Windows updates
- Verify administrator permissions
- Confirm compatible operating system
Step 1 – Disable Running Jobs
Open the Veeam M365 Console.
- Go to Jobs
- Right-click active jobs
- Select Disable
This prevents job interruption during upgrade.
Step 2 – Backup Configuration Database
Always take a backup before upgrading.
If Using Local PostgreSQL
Backup location generally:
Use pgAdmin or PostgreSQL backup utility.
If Using Remote SQL/PostgreSQL
Ask DBA team to perform full database backup.
Step 3 – Stop Veeam Services
Open Services.msc
Stop the following services:
- Veeam Backup for Microsoft 365 Service
- Veeam Broker Service
- Veeam RESTful API Service
Step 4 – Mount or Extract Upgrade ISO
- Right-click ISO
- Select Mount
- Open mounted drive
Step 5 – Start Upgrade Wizard
The installer automatically detects the existing installation.
Click:
Accept license agreement and continue.
Step 06 – Enable Backup Jobs
- Go to Jobs
- Right-click disabled jobs
- Click Enable
- Run one test backup
About the Author
Sumit Saini
Passionate about Veeam, Backup Technologies, and Infrastructure Solutions.
+1Upgrade Veeam M365 from 8.3.0.2201 Ver to Ver 8.4.0.1457
+23Nice guide for updating VB365. 👍
+9Nice guide!
Thanks!
+23Thank you for sharing your VBM365 Upgrade Guide with the Community
+6great guide! thanks for sharing!
Hello,
can you share Veeam ulr from where I can download 8.4 version or any 8.x (older than the lastest 8.6)?
On Veeam download page, last version is available (8.6), under “previous version” only 7.1 is available :(
Hello, I’m not suer if this correct post, but I’ll ask:
I upgraded VB365 from version 7.1 to 8.4 and then to 8.6. The new privileges in Entra ID were added, and the backup is working. However, I’m not able to restore anything from before the upgrade. Veeam 365 doesn’t see any of the old backups, even though the repositories are indexed and the proxies are up to date. The old backups still exist on the repository/disk (there are folders with databases “repository.adb” for 2020, 2021, 2022, 2023, 2024, 2025, and 2026).
In the repository, Veeam creates folders like “Backup__2025_b545fg651-8jh7-44566gf349-734566nkl35f1”.where are also databases “repository.adb”
Do you have any idea how to resolve this and restore items created before the upgrade?
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