What Are the Downsides of O365, Email and SharePoint

Microsoft 365, email via Exchange Online and SharePoint are among the most widely used business tools in the world — but as with any tool, there are real downsides worth knowing about. In this article we look at them honestly: what the genuine downsides are, why in practice they're not critical, and why the benefits far outweigh these downsides.

The downsides most often mentioned

• Dependence on an internet connection — web apps and the full functionality of SharePoint require a connection; without one, access is limited.
• Learning curve — moving from local folders and a classic email client to SharePoint, Teams and cloud collaboration requires a change of habits and training.
• Ongoing subscription costs — instead of a one-time software purchase, the company pays a recurring monthly or annual fee per user.
• Complexity of permission setup — SharePoint allows very granular access configuration, which without proper setup can lead to mistakes (too many or too few access rights).
• Risk of disorganization as you grow — without established structure and rules, libraries and teams in SharePoint or Teams can over time become "overgrown" with duplicate or unused spaces.
• Dependence on a single provider — moving data and processes outside the Microsoft ecosystem is more demanding once you have a large volume of data and established workflows.
• Outages on the provider's side — though rare, a Microsoft outage affects every user of the service at once.
• Longer access or save times for larger files — uploading, opening or saving large files (for example extensive Excel workbooks, videos, CAD drawings) is generally slower over the cloud than working from a local disk, because the data has to travel over the internet connection.
• Limited ability to process data from individual files into final reports — SharePoint is first and foremost a file store, not a database; if you need data from several separate files automatically combined into one clear report, a document library alone isn't enough.

Why these downsides aren't critical in practice

What O365, email and SharePoint bring instead

• Automatic backup and recovery — document versions, protection against ransomware and change history without needing your own backup infrastructure.
• Real-time collaboration — several people can work on the same document at once, without emailing attachments back and forth or creating duplicate versions.
• Access from anywhere — from a computer, phone or tablet, enabling remote work and team flexibility.
• Security features at a level a smaller company would struggle to build itself — MFA, conditional access, encryption and anti-phishing protection built right into email.
• Ongoing updates without IT involvement — new features and security patches are deployed automatically, without needing to maintain your own servers.
• Scalability — adding or removing a user is a matter of minutes, with no need to buy new hardware.
• Tools for automated data processing and reporting — Power Query, Power BI and Power Automate are part of the Microsoft 365 ecosystem and can automatically combine data from multiple files or sources into clear reports and dashboards.

Why the benefits clearly outweigh the downsides

When the downsides and benefits are placed side by side, an important difference in their nature emerges: the downsides are mostly temporary or solvable — through training, correct setup, introducing order — while the benefits address permanent and otherwise very costly problems, such as backup, security, availability and collaboration.

This is exactly where the difference lies between a "downside" and a "risk": a downside can be managed or limited with a bit of effort, while the absence of the benefits (for example missing backups or MFA) represents a real, hard-to-remove risk. That's why, for most companies — both small and medium-sized — the comparison clearly favors Microsoft 365.