I have configured the DLP inside the M365 tenant to detect documents containing sensitive information like Bank Accounts.
However when typing a Bank Account directly in the email content a message pops-up asking me if I want to override and allow send this message. But when the same Bank Account is part of a attachment like pdf or docx no message pops-up.
After pushing the send button the email is scanned, blocked and returning a message 'the DLP has detected sensitive information'
Really frustrating considering you have to decide: disable the policy or never send sensitive info.
I tested this on a E5 environment as well and there is no difference unless Microsoft says the license should allow it for this environment.
I tested this also online and there you receive the override option -;(
I hope somebody can help me because it's becoming really frustrating for me but also for my clients because it counts for all detected sensitive information configured in the DLP.