Someone hands in their notice. They have two weeks left. They still have full access to your client list, your contracts, your pricing documents and your financial records.
Would you know if they were quietly downloading files before they left?
For most businesses the honest answer is no. And by the time you find out, the damage is already done.
Data leaks from the inside are more common than you think
It does not have to be malicious. A member of staff emails themselves a document to finish at home. A contractor copies files they worked on. Someone leaving for a competitor takes the client list they built. Each of these happens regularly across businesses of every size, and none of them are caught by standard Microsoft 365 security settings.
The risk is real. Under GDPR, your business is responsible for what happens to personal data stored in Microsoft 365, including what leaves through an employee's personal email or USB drive. The ICO does not accept "we did not know" as a defence.
How Microsoft 365 Business Premium can detect insider risk
If you are on Microsoft 365 Business Premium, or considering upgrading, there is a compliance add-on built specifically for this: the Microsoft Purview Suite for Business Premium.
One of its core features is Microsoft Purview Insider Risk Management. It uses behavioural analytics to detect risky activities, like an employee downloading large volumes of files before leaving the company. Privacy is built in, so you can act early without breaking employee trust.
In practical terms, if a Microsoft 365 user starts downloading unusual volumes of files, forwarding emails to personal accounts, or accessing data outside their normal patterns, the system flags it. You can investigate quietly before anything escalates.
Is Your Microsoft 365 plan doing enough?
Most businesses set up their Microsoft 365 plan and never revisit it. Meanwhile the compliance and security landscape has changed considerably. These capabilities were previously limited to large enterprises but are now accessible to smaller organisations through Business Premium.
If you are on Microsoft 365 Business Basic or Standard, it is worth understanding what your plan does not cover. If you are already on Microsoft 365 Business Premium, the Purview Suite is available as an add-on and could be the difference between catching a data incident early and discovering it months later.
Business Premium and the Purview Suite are designed for organisations with up to 300 users. If your business is growing beyond that, it may be time to look at enterprise plans such as Microsoft 365 E3 or E5, which offer a broader set of compliance and security capabilities. Either way, we can help you understand the right fit.
How Reflective IT Can Help
At Reflective IT we review Microsoft 365 licensing with our clients as part of our Managed IT Support. If you want to know what your current Microsoft 365 setup covers and where the gaps are, speak to our team.
📞 0207 317 4535 | 📧 support@reflectiveit.com
