Microsoft 365 Data Loss Prevention (DLP) policies have wide-ranging capabilities when it comes to rules and exceptions. One exception covers the various types of encrypted email that can pass through the Exchange Online transport pipeline. As it happens, three message types are supported, but who could have guessed that permission controlled means rights management?
To make Microsoft 365 DLP policies work like Exchange transport-rule based DLP, a January change will switch evaluation of sender conditions away from envelope information to message headers. Although this change might seem to be something beloved of email geeks, it’s actually an important update for organizations who want to move away from ETR-based DLP to Microsoft 365 DLP policies.
Teams meeting recordings can contain a lot of confidential information. It’s a quick and easy task to create a Data Loss Prevention (DLP) policy to stop people sharing these files externally, In this post, we show just how simple the required policy is, and just how effective it is at stopping external sharing.
Microsoft plans to surface recommendations to use communications compliance policies as part of its DLP workflow. That sounds acceptable, but it’s the second example of how Microsoft pushes high-priced premium features to Office 365 tenants through DLP. Apart from the undesirability of pushing features to customers through software, communications compliance is not something that you implement on a whim, so why does Microsoft think this is a good idea?
Teams Data Loss Prevention (DLP) policies help to stop users sharing confidential information through chats and channel conversations. A recent update means that accounts to be included or excluded in DLP policies can be specified using distribution lists or mail-enabled security groups. While this doesn’t sound very exciting, it is if you need to deploy DLP policies to targeted sets of Teams users.
Feb 24 2021 Update: The picker used for OneDrive for Business accounts will support distribution lists and security groups in March.
Microsoft has released a set of new sensitive information types, used to locate sensitive data by Microsoft 365 DLP policies. Many are country-specific versions of previous generic types (like passports or identity cards). The recommendation is to consider upgrading DLP policies to use the new types to get better (more accurate) matching.
When you need to block external access to your most sensitive documents, Office 365 Data Loss Prevention policies and sensitivity labels combine to find and protect the documents. A really simple policy is enough to detect and block external access, and is covered by Office 365 E3 licenses. If you have E5 licenses, you can consider auto-label policies to find and protect sensitive documents at scale.
Office 365 offers different ways to apply encryption to important messages. When those messages hold sensitive data known to Office 365, like credit cards or passport numbers, we can define a transport rule or DLP policy to protect outbound email automatically. And while you can define rules and policies through the GUI, PowerShell is available too.
Microsoft thoughtfully provided Office 365 tenants with a Data Loss Prevention template for GDPR personal data. The only problem is that the rules in the template were too sensitive and started to block email.