Choosing between cloud and on-premises servers

What has changed

A decade ago, most small offices needed an on-premises server for files, email, printing and user accounts. Today, Microsoft 365 handles email and files for many organizations, and most business applications are offered as cloud services. That shift means the question is often not whether to have a server, but whether the remaining workloads still justify one.

Typical workloads that still live on local servers include older accounting or practice management software, large engineering or design files, specialized equipment control and applications that a vendor only supports on-premises. List your workloads first, then decide where each one belongs rather than making a single all-or-nothing choice. Some will move easily, others will not.

The case for the cloud

Cloud services shift responsibility for hardware, power, cooling and much of the maintenance to the provider. You avoid large capital purchases, gain access from anywhere and benefit from infrastructure designed for high availability. For a small office without dedicated IT staff, removing a physical server also removes a single point of failure that can sit unnoticed until it stops working.

Cloud services are not automatically secure or backed up, however. You still need multi-factor authentication, sensible sharing settings, access reviews and a separate backup of your cloud data. Subscription costs also continue indefinitely, so compare total costs over five years rather than only the first year. Factor in licence growth as well.

The case for on-premises

Local servers still make sense in some situations. Very large files, such as CAD drawings, survey data or video, can be slow to work with over a limited internet connection. Some industry applications are only supported on-premises. In rural Alberta, where internet service may be limited or less reliable, keeping critical systems local can keep the office working when the connection drops.

On-premises servers need care. Hardware must be replaced on a lifecycle, the operating system must stay supported and patched, and backups must include an offsite or cloud copy. Physical security, uninterruptible power and adequate cooling in the server space are easy to overlook in a small office closet. Each of these has an ongoing cost.

Hybrid is common

Many organizations end up with a hybrid approach. Email, collaboration and most documents live in Microsoft 365, while a small local server or network storage device handles a specific application or large files and synchronizes with the cloud where possible. This gives you the benefits of both approaches but requires clear documentation of what lives where.

When planning a hybrid setup, consider the questions below. The answers will usually point clearly toward one location for each workload, and recording them helps whoever supports your environment in the future understand why it was built that way. Revisit the answers when applications, staffing or connectivity change, since a workload that belonged on-premises three years ago may now be better suited to the cloud.

• How many people need the workload, and from where?
• How large are the files and how fast is your connection?
• Does the vendor support a cloud version?
• What happens if the internet or the server is down for a day?
• Are there privacy or contractual rules about data location?

Making the decision

Ask your IT provider for a written comparison that covers five-year costs, required internet capacity, backup approach, security responsibilities and the effect of an outage for each option. Include migration costs and staff time, since moving data and retraining people is often the most underestimated part of any change. Ask for the assumptions to be stated plainly.

If your server is approaching the end of its warranty or its operating system is losing support, that is a natural time to make the decision. Replacing an old server like for like without considering alternatives can lock you into another five years of the same approach, even when a different option would serve the business better.