Not sure if you guys have already come across this, There seems to be a gap in Intune policies which allows users to use IMAP and POP3 email to work around MDM.
What have you done int his case? Your thoughts, please....
Why are you relying on MDM for this? Block it at the email server level. You haven't said which email you use so I've included how to block IMAP and POP3 access via PoSH for Exchange Online.
Why are you relying on MDM for this? Block it at the email server level. You haven't said which email you use so I've included how to block IMAP and POP3 access via PoSH for Exchange Online.