Today I tried to build DLP policy on devices, to prevent users from copying sensitive data to their personal cloud account (google drive or one drive). I tried all the block actions on "Restrict access or encrypt the content in Microsoft 365 locations" blade. What should I configure more to succeed.
Dear Friends, It's all my fault not to prevent this issue. My solution, if you want to prevent sharing sensitive data to personal cloud account, you should build DLP policy "Microsoft Defender for cloud Apps" location.