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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.

 

Forum Posts

  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
  • 1162 Views
  • 2 replies
  • 0 Helpful votes

Hi All,I have configure outgoing mail (FROM O365 TO CES) using below link and got connector activated sucessfully, However im not able to see any message tracking logs for outgoing mailshttps://www.cisco.com/c/en/us/support/docs/security/cloud-email-...

sv7 by Level 5
  • 489 Views
  • 1 replies
  • 0 Helpful votes

HI,anyone have a workaround to boosting Active Messages in Work Queue.  i do adjust some rule policy where email drop not scan by antivirus so it direcly drop. but its not enough so i need some workaround to boosting my work queue.BTW my cpu utilizat...

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faruqfarkhan by Frequent Visitor
  • 1289 Views
  • 2 replies
  • 0 Helpful votes

Resolved! Log queue in ESA

Hai guys, So i got some log saying that " receiveing failed : queue full ", i got this log from tyoe  "IronPort Text Mail Logs" syslog to our log server But when i checked, on dashboard it say Messages in Work Queue:  0 and i check the email not co...

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faruqfarkhan by Frequent Visitor
  • 1067 Views
  • 1 replies
  • 0 Helpful votes

Hello, Thank you in advance for your time and consideration to this situation.Two separate business entities, with their own contracts and ESAs, are unable to mail 2 seperate on-prem exchange business entities.Sender1 cannot send to Receiver1Sender2 ...