Data loss prevention and sensitivity labels
Data loss prevention (DLP) watches for sensitive data leaving the company by mail, file share, chat or a browser upload. Sensitivity labels mark a document as public, internal or confidential and can encrypt it, so the protection travels with the file.
What we do
- Data classification workshops
- Label design and rollout
- DLP rule tuning
- Audit-mode pilots
- Alert triage runbooks
- Endpoint DLP setup
- Exception and override review
Our team works with Microsoft Purview DLP and sensitivity labels in Microsoft 365, and has experience with other DLP products. We start in audit mode, tune the rules against real traffic, then move to warnings and blocks. Policies follow the customer's written data classification, not a template.
This group links to our Cybersecurity and Managed IT services and to the Microsoft 365 security group. These are tools our team has experience with, not partnerships.
Leading platforms we work with
- Microsoft Purview
- Proofpoint Information Protection
- Forcepoint
- Symantec DLP
- Digital Guardian
Platforms and practices
- Sensitive information types and classifiers
- Sensitivity label taxonomy
- Label-based encryption
- Auto-labeling policies
- DLP for Exchange, SharePoint and OneDrive
- DLP for Teams chat
- Endpoint DLP for USB and uploads
- Policy tips and user overrides
- Audit mode before enforcement
- Alert triage and incident review
References
Sources last checked .
Product names are trademarks of their owners and are listed to describe our experience; they do not imply endorsement or partnership.
How we use Data loss prevention and sensitivity labels for clients
Cybersecurity
We find out whether everything you run is safe from attackers, then we fix it.
Learn moreManaged IT Services
We run your IT day to day so it stays secure: help desk, devices, Microsoft 365, Exchange, Active Directory, backups, networks and monitoring.
Learn moreEmail Security, Archiving & Continuity
Filter threats out of mail, keep every message in an immutable archive you can search, and keep email working when the mail platform goes down.
Learn moreWhere this matters most
Frequently asked questions
Direct answers to the questions we hear most. Something else on your mind?
Send us a messageWhy start data loss prevention in audit mode?
Audit mode records what the rules would have blocked without stopping anyone. That lets us tune the rules against real mail, files and chats before they interrupt work. Moving straight to blocking usually causes false alarms and workarounds.
Does a sensitivity label encrypt the file?
It can. A label marks a document as public, internal or confidential, and it can also apply encryption so the protection travels with the file. Encryption is a setting on the label, not automatic, so it has to be designed and tested.
Can DLP stop someone copying files to a USB stick or uploading them to a website?
Endpoint DLP can warn about or block those actions on managed devices. It only covers devices that are enrolled and have the policy. Personal devices and unmanaged browsers need other controls.
Do we need a written data classification first?
Yes. Rules and labels should follow your own classification, such as what counts as confidential and who may share it. A template borrowed from elsewhere tends to block the wrong things. A short workshop usually produces enough to start.