When backup projects are implemented, it’s not just about architecture design, configuration, features, and price. Once environments grow, responsibilities shift between internal teams and partners, or additional services such as Microsoft 365 are introduced, another topic should move to the foreground—one that may have been underestimated at the beginning: the licensing model.
Subscription and Rental are not just different purchasing paths—they impact scalability, usage measurement, billing, and the question of whether backup and monitoring can truly be delivered as a single, end-to-end view. In this article, I compare both models from a practical perspective—looking at Veeam Backup & Replication, Veeam ONE, and Veeam Backup for Microsoft 365—and explain why mixed licensing worlds can sometimes become a stumbling block.
1) Why licensing is more than “annual vs. monthly”
In theory, licensing is something for Procurement: term length, price, discount, renewal.
In practice, the licensing choice directly affects:
- How quickly you can scale licenses (and whether “downscaling” is even possible)
- Who the contracting party is (end customer vs. service provider)
- How usage is measured and billed
- How cleanly you can centralize reporting/monitoring
- How compatible the overall solution is when components come from different “worlds”
If you want to bring Veeam Backup & Replication (VBR), Veeam ONE, and Microsoft 365 backup under one roof, you should consider the licensing model as part of the architecture decision.
Veeam distinguishes, among other things, the license types Subscription and Rental (besides Perpetual/Legacy) in its Licensing Policy.
Source: https://www.veeam.com/legal/licensing-policy.html
2) Subscription vs. Rental – what’s the difference?
Both models are classic modern IT licensing approaches offered by many vendors. But what exactly is the difference—and what are the strengths and weaknesses of each model?
2.1 Subscription
Subscription means you purchase a license for a defined period (typically 1–5 years).
This is the modern standard—especially for services — and is definitely a good choice when:
- the environment is relatively stable
- the environment is self-managed (or you want to retain control)
- predictability is important and you want a clear renewal cycle
Strengths:
- Budget and contract predictability
- Consistent governance (procurement, compliance, audit)
- Often cheaper per “unit” for long-term stable usage
Weaknesses:
- Reducing license quantity (“downscale”) is generally not possible during the purchased term
- Growth (“upscale”) is possible, but not always “instant and frictionless” (offer, ordering process, etc.)
2.2 Rental (via partner / service provider)
Rental means “renting” not owning — and that is exactly what it is. This model is tied to the service provider approach: the provider owns and purchases the licenses and rents them to the end customer as needed. The partner typically bills periodically (often monthly) based on usage and frequently bundles this with services (operations, monitoring, storage, DR, etc.).
In practice, Rental is attractive when:
- you have a highly fluctuating environment,
- you want to scale up/down quickly and easily,
- you use a managed service model (e.g., Backup as a Service).
Strengths:
- Flexibility, especially when workloads/user counts change frequently (e.g., monthly)
- Great fit for OPEX-oriented service and management models
Weaknesses:
- Potential provider lock-in (contract/process/billing runs via the partner)
- Central operations and reporting depend heavily on partner processes
- Can be more expensive long-term if usage is constantly high and you don’t really need the flexibility, especially the “downward” functionality
3) So which is better: Rental or Subscription?
That’s hard to answer, because every use case is unique. Depending on your operating model and cost planning, the evaluation can look very different. But for a rough classification, two simple cases help.
3.1 If your licensed environment size is stable (and maybe grows slightly) and is self-managed
Subscription is a good choice because you can plan well, have less billing “micromanagement,” and often get better terms with longer commitments (when that makes sense).
Example: 500 VMs with ±5% growth over the year
You typically don’t want a monthly billing process—just a clear annual plan.
3.2 If your environment grows in spikes or fluctuates heavily and can change at any time
Rental is a good choice because you don’t have to pre-order/commit to a license quantity upfront. You can also react faster to projects. Costs can be more closely tied to actual usage.
Example: You roll out 800 new M365 users in 3 months, then reduce again later because a project ends. Also if you don’t know how many license you need in reality, this is a safe and good choice.
You look for a contract that allows monthly adjustments and potentially includes managed services.
4) Compatibility & monitoring – why mixing licensing models may not be a good idea (Veeam ONE focus)
Technically, you can combine many components—but from a licensing perspective there are clear compatibility rules. For Veeam ONE, it is documented which VBM365 licenses are compatible. If you want to use Veeam ONE as the central monitoring tool for VBR and VBM365, you should verify early whether the chosen licensing models are compatible—and keep the licensing model consistent across all components.
Veeam ONE compatibility with Veeam Backup for Microsoft 365 licenses:
https://helpcenter.veeam.com/docs/one/userguide/license_types.html?ver=13#compatibility-with-veeam-backup-for-microsoft-365-licenses
So if your Veeam ONE should monitor both VBR and VBM365, you need to choose one licensing model and keep it consistent.
5) License overage – the 10% / 20% rule
In every environment there are short-term changes nobody can predict everything far in advance: a project starts earlier, new users roll out faster, an M&A case happens, or a department simply says “we need to protect 20 more systems today.” For exactly these situations, Veeam provides — depending on product and license model—mechanisms such as Exceeding License Limits and Grace Periods.
The key is setting expectations correctly: these rules are primarily an operational safety net so that backup and monitoring processes don’t stop immediately during short-term growth. They are not a long-term solution and do not replace proper licensing if the additional usage is meant to remain permanent.
My practical recommendation: Whether Subscription or Rental — define a regular routine (“License Health Check”), monitor utilization frequently, and clarify in advance who acts when limits are exceeded (IT operations, procurement, or partner). This prevents short-term growth from turning into an audit or billing issue.
– VBR Subscription
Veeam Backup & Replication can exceed the subscription license by 10% (relative to the licensed workload count). If the license auto-update function is enabled, even 20% overage is possible. No grace period applies here.
Important: Capacity VUL licenses for unstructured data cannot be exceeded.
Veeam Backup & Replication Rental licensing can be exceeded for 60 days (grace period) by 20% + growth compared to the previous month.
– Veeam ONE Subscription
Veeam ONE Subscription allows 10% (or 20% with license auto-update enabled) overage. The grace period is 30 days, and for the higher overage an active license usage report must have been transmitted during that period.
Veeam ONE Rental licensing can be exceeded by 20% for 30 days, and an active license usage report must also have been transmitted during that period.
– VBM365:
Veeam Backup for Microsoft 365 Subscription licensing allows 10% (or 20% with auto-update) overage. A 30-day grace period applies, and an active license usage report must be transmitted during that time.
Veeam Backup for Microsoft 365 Rental licensing allows 20% (or even 40% with auto-update) overage. A 30-day grace period applies, and an active license usage report must be transmitted during that time.
Quick overview
Sources:
VBR Exceeding License Limit: https://helpcenter.veeam.com/docs/vbr/userguide/license_exceeding.html?ver=13
VBR Rental License Exceeding: https://helpcenter.veeam.com/docs/vbr/cloud/cloud_connect_hosting_licenses.html?ver=13
VBR License Auto-Update: https://helpcenter.veeam.com/docs/vbr/userguide/license_autoupdate.html?ver=13
VOne Exceeding License Limit: https://helpcenter.veeam.com/docs/one/userguide/license_expiry_grace_period.html?ver=13
Rental Exceeding Lincense Limit: https://helpcenter.veeam.com/docs/vcsp/refguide/exceeding_license_limit.html
VBM365 Subscription License: https://helpcenter.veeam.com/docs/vbo365/guide/vbo_subscription_license.html?ver=8
VBM365 Rental License: https://helpcenter.veeam.com/docs/vbo365/guide/vbo_rental_license.html?ver=8
6) Checklist: questions to clarify before choosing a licensing model
- Who operates VBR/Veeam ONE/VBM365—end customer or partner?
- Will M365 be implemented as self-managed VBM365 or as Cloud/SaaS?
- How much does the license count (VMs/workloads, M365 users) fluctuate per month?
- Do you need “downscaling” during the term?
- Who provides first-level support?
- Are there minimum commitments in the Rental contract?
- What happens in case of license exceeding?
- How do you handle M&A/project spikes?
- Exit strategy: how do you switch provider or licensing model?
7) Conclusion: it’s not about “better”—it’s about “fit”
Subscription and Rental are both valid models. The key takeaways for backup & monitoring are:
- Subscription is often ideal for controlled, stable operations with a consistent end-customer view (e.g., Veeam ONE as a central instance).
- Rental is often ideal for flexibility and service-oriented scenarios
- Use VBR, VOne and M365 Backup with the same License model!
So which model are you using/offering and why?
