So you need to create a custom Office 365 / Exchange Online DLP policy with Regular Expression Sensitive Information Type
Microsoft 365 Data Loss Prevention (DLP) | Spanning
Configuring and using Data Loss Prevention in Microsoft Teams | Practical365
Getting Comfortable with Data Loss Prevention Policies in Office 365 | Practical365
Data Security with Office 365 Data Loss Prevention - ShareGate
Microsoft Unified DLP update April 2021
Enhance Microsoft 365 Data Loss Prevention | Blog Clearswift
Configuring data loss prevention for email from the Compliance Center in Microsoft 365 – 4sysops
Office 365 Data Loss Protection – DLP - Rached CHADER
Plan for data loss prevention - Microsoft Purview (compliance) | Microsoft Learn
Enable Data Loss Prevention in Office 365 Compliance Management
Learn about data loss prevention - Microsoft Purview (compliance) | Microsoft Learn
Microsoft Cloud App Security integrates with third party Data Loss Prevention solutions - Microsoft Community Hub
The Definitive Guide to Office 365 DLP
How to Set Up an Office 365 Data Loss Prevention Policy | Miktysh Blog
Microsoft 365 Data Loss Prevention (DLP) | Spanning
Microsoft Mechanics Podcast: Endpoint Data Loss Prevention (DLP) | What it is and how to set it up in Microsoft 365
Leveraging Data Loss Prevention for Effective Defence
Managing Office 365 DLP (Data Loss Prevention) – Maureen Data Systems
Microsoft 365 DLP – The (new) control pane? – AlbertHoitingh.com
Configuring Microsoft 365 to use Microsoft 365 for email delivery (Reflecting mode)
