Advanced Security Controls
This section includes options to skip enforcement of certain security features, which you may want to do permanently for trusted destinations or temporarily to troubleshoot an issue.
This section includes the ability to access files without decrypting them (sometimes known as "protected file bypass") and the ability to not enforce certain web security features for this rule.
In general, you should allow access to encrypted files only for trusted destinations, because encrypted files cannot be effectively assessed for threats. By default, access to encrypted files is not enabled.
Disable security features only when you have a specific reason to do so.