Which of the following two statements are correct about the large file attachments (greater than 25MB) feature in Cisco Secure Email Encryption Service? (Choose two.)

The Cisco Secure Email Encryption Service (CRES) large file attachment feature has specific operational requirements and delivery mechanisms. First, for the feature to be enabled on an encryption profile, the "Read from Message" feature must also be enabled as a prerequisite. This allows the system to correctly process the message for large file handling. Second, the delivery method for any CRES-encrypted email, including those with large attachments, involves sending the recipient a notification email containing a securedoc.html attachment. This HTML file is the secure gateway through which the recipient authenticates and accesses the encrypted message body and the links to download the large files from the CRES portal.

A. Large file attachments can only be sent using the websafe portal: This is incorrect. The Cisco Secure Email Add-In for Outlook is a primary tool for users to send large encrypted files directly from their email client.
B. This feature allows users to send up to 50MB of attachments in a secure email: This is incorrect. The feature supports significantly larger files, with a maximum size of up to 2 GB per attachment.
D. Large file attachments can only be sent using the Cisco Secure Email Add-In: This is incorrect. While the Add-In is a common method, users can also compose and send secure messages with attachments directly from the CRES websafe portal.

1. Cisco Secure Email and Web Manager 15.0 User Guide: In the chapter "Using Email Encryption," the section "Configuring Encryption Profiles to Use the Cisco Secure Email Encryption Service" explicitly states the prerequisite for enabling large file attachments: "To enable this feature, you must also enable the Read from Message feature." This directly supports option E.

2. Cisco Secure Email and Web Manager 15.0 User Guide: The same section details the size limit: "The maximum size of a large file attachment is 2 GB." This proves option B is incorrect.

3. Cisco Secure Email Encryption Service End-User Guide: This guide describes the recipient's experience, stating, "To open the secure message, open the attachment (securedoc.html) and follow the instructions on the screen." This confirms that the securedoc attachment is the standard mechanism for accessing any CRES-encrypted content, which supports option C.

4. Cisco Secure Email Plug-In 8.1 for Microsoft Outlook User Guide: This document details how users can "send a large encrypted attachment" directly from Outlook, which invalidates the exclusivity claims in options A and D.