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Important Announcements

Cisco Secure Email Add-Ins No Longer Supported on Microsoft Outlook 2019

This is to inform you that, effective October 14, 2025, Microsoft Outlook 2019 is no longer supported for the Secure Email Encryption Service Add-In and Secure Email Submission Add-In.

To continue using these Add-Ins, we recommend upgrading to Microsoft 365. Starting October 2025, download and install the new manifest for:

- Secure Email Encryption Service Add-In from the CRES Admin Dashboard

- Secure Email Submission Add-In from the Cisco Software Download Portal

After downloading the manifests, follow the instructions provided in the Submission and Encryption Add-In guides. For more information, see: Cisco Email Encryption - End-User Guides.

TLS 1.0/1.1 Deprecation from AsyncOS for Secure Email Gateway, Starting version 16.5

We would like to inform you that starting with the AsyncOS 16.5 release, TLS versions 1.0 and 1.1 will no longer be available as configuration options in both the CLI and GUI.

To ensure secure email delivery and receipt, you should use TLS versions 1.2 and 1.3. These versions can be configured via the sslconfig CLI command or through the System Administration > SSL Configuration menu in the user interface.

For detailed instructions on updating TLS versions, please refer to the “System Administration” section of the User Guide for AsyncOS 16.0.x for Cisco Secure Email Gateway.

 

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Migrate from Secure Email Virtual C100V to Avoid McAfee-Related Issues

  Important: Migrate from Secure Email Virtual C100V Models to Avoid McAfee-Related Issues Dear Valued Customer, We are reaching out to ensure your Cisco Secure Email environment continues to operate at optimal performance and reliability. As worklo...

dmccabej by • Cisco Employee
  • 903 Views
  • 2 replies
  • 0 Helpful votes

C170 Redundancy

If C170 IronPort does not support Hot-Standby configuration as per mention in link https://supportforums.cisco.com/thread/2178201 (Configuring the two boxes as one), which IronPort models can support that?Hussein Ismail

Resolved! Queue is not mounted

We just replaced our C300 with a C350 using the export config / import config and all went well.Then we tried the same thing to replace our C600 with a C660 and it looked like all went well, but now the C660 shows "Queue is not mounted" on the System...

ESA - External Auth - Spam Quarantine

I'm looking to see if anyone has a workaround for admins logging into Spam Quarantine and not being able to set their safelist / block list.  I'm using AD accounts for TACACS+ / Radius on my ACS 5.4 appliance and I found an issue when using Radius fo...

kevina887 by • Level 4
  • 1399 Views
  • 1 replies
  • 0 Helpful votes

CRES Registration for Mobile Users

Currently, for mobile users using BCE mobile app, the registration with CRES service is a vey difficult task. Is there any plan on the roadmap to provide a mobile friendly interface to CRES portal via BCE?Thanks,JohnSent from Cisco Technical Support ...

Two factor auth for CRES portal

This is a wishlist of mine which I hope would get into the plans for future enhancements to CRES service. Some form(s) of two factor authentication for access to CRES service would be very useful. I'm thinking of a low overhead approach for both inte...

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