Safe Print converts supported attachments, such as .docx files, into image-based PDF files for safer viewing. The Maximum File Size setting in Safe Print Settings controls the largest attachment size eligible for this conversion, so setting it to 5 MB meets the requirement.

Disabling the Local Spam Quarantine to Activate the External Quarantine If you were using a local spam quarantine before enabling an external spam quarantine, you must disable the local quarantine in order to send messages to the external quarantine.
https://www.cisco.com/c/en/us/td/docs/security/esa/esa11-1/user_guide/b_ESA_Admin_Guide_11_1/b_ESA_Admin_Guide_chapter_0101010.html?bookSe arch=true#con_1172419

Explanation:
This order ensures encryption is enabled before editing settings to apply the message size limit.

Outbreak Filters can take the action of rewriting URLs to redirect traffic to potentially harmful websites through a web security proxy. This allows the Cisco Secure Email Gateway to scan the content of the websites and block or warn the user if they are malicious or undesirable. This action can stop small-scale and nonviral attacks, such as phishing scams and malware distribution sites, that may not be detected by other filters.