Use Distribution Lists or Security Groups to Add Accounts to DLP Policies
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.