Veeam Backup for Microsoft 365: Complete Review for IT Teams
Our Rating
Pros
- Granular restore for Exchange, SharePoint, Teams, and OneDrive
- Flexible storage targets including immutable object storage
- REST API for automation and reporting
- No per-user overage surprises on most licensing tiers
Cons
- Initial storage sizing can be underestimated without guidance
- UI for Teams data restore is less intuitive than Exchange restore
Verdict
Veeam remains the benchmark for M365 backup. The granular recovery options and storage flexibility make it the default recommendation for any organisation that has done an honest audit of what Microsoft actually retains.
The Context: Why M365 Backup Matters
Microsoft's native M365 data retention is not a backup. The retention policies in the Compliance Centre are designed for legal hold and eDiscovery — they are not designed for point-in-time restore of accidentally deleted mailboxes, SharePoint sites, or Teams conversations.
If a user permanently deletes their mailbox contents, or if a malicious actor with admin credentials purges data, Microsoft's native capabilities may not provide recovery to the point you need. Veeam fills this gap.
What Gets Backed Up
Veeam Backup for Microsoft 365 v8 covers:
- Exchange Online: Mailboxes, archive mailboxes, shared mailboxes, public folders
- SharePoint Online: Site collections, document libraries, list items, metadata
- OneDrive for Business: Full content and version history
- Microsoft Teams: Channel messages, chat history, files (via SharePoint integration)
Teams chat history backup is the most complex — it is captured via a Graph API integration and stored separately from the Exchange conversation history. The restore experience for Teams chats is less polished than for Exchange, which is a known limitation.
Architecture and Storage
Veeam operates as an on-premises or Azure VM installation. You specify one or more backup repositories — local storage, Azure Blob Storage, S3-compatible, or a combination. For immutability, Azure Blob Storage with Object Lock or an S3 bucket with WORM policy is supported.
We tested with Azure Blob (cool tier) as the primary repository and a secondary copy to Azure Archive for long-term retention. The storage costs for 200 users over 12 months were within budget for our client's requirements.
Backup Performance
Initial backup (seeding) for a 200-mailbox tenant took approximately 18 hours on a modest Azure VM (4 vCPU, 16 GB RAM) with a 1 Gbps connection. Subsequent incremental backups completed in under 2 hours overnight.
Backup jobs can be throttled to avoid impacting M365 performance — we saw no issues with the default throttling settings during business hours.
Restore Granularity
This is where Veeam genuinely earns its price point. Restore options include:
- Individual item restore: Single email, calendar item, contact, document, or folder
- Point-in-time mailbox restore: Restore an entire mailbox to a specific date and time
- Cross-user restore: Restore deleted user's data to a different mailbox
- Export to PST: For compliance or data transfer scenarios
- SharePoint granular restore: Individual document versions, list items, or full site collections
The restore wizard in the Veeam console is well-designed. First-time users can complete a point-in-time mailbox restore without consulting documentation.
Weaknesses
Initial storage sizing: Without proper guidance, organisations consistently underestimate storage requirements. Teams data in particular can grow faster than anticipated due to file attachment storage. Size with a 30–40% buffer.
Teams restore UX: Restoring Teams chat messages is possible but less intuitive than Exchange restore. The granularity is there; the interface needs work.
Server management: Unlike pure SaaS backup solutions, Veeam requires you to maintain the backup server VM. This is a non-trivial operational consideration for smaller IT teams.
Verdict
Veeam Backup for Microsoft 365 is the benchmark in this category. If your organisation has done an honest assessment of what Microsoft actually retains — and understands the gaps — Veeam is the most capable and well-supported option available. The granular restore capabilities alone justify the investment for regulated industries.
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Priya Nair
Microsoft 365 & Entra ID Specialist
Priya designs identity and access management solutions across Microsoft 365 tenants. Her focus areas are Conditional Access architecture, Privileged Identity Management, and hybrid identity.