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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
  • 868 Views
  • 2 replies
  • 0 Helpful votes

Issue:- Question on Decommission C390 ESA. Queries:- Since the EOL appliances are part of the cluster (together with the Production appliances), do we need to detach it before proceeding with the decommission process? The status of these appliances ...

Hello,We get alerts when our CES instance swap memory goes above 60%. This appears too low as there is no registered degradation of service.Is there any recommendations on this to adjust these to be more helpful? Thanks

mrjelly by Level 1
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Hey all, Is there anywhere I can see the activity history of the domain map?We have one in place for a bunch of legacy domains and I am trying to determine if any of the addresses listed are long dormant & can be safely removed.  The mail_logs don't ...

I still do not get it.We've Cisco ESA C190, using GUI.I found Mail Policies - Outgoing Content Filters.Ok, now I can "add outgoing content filter" with condition and action.I can add condition "message body - contains text", but in the actions there ...

Hello everyone, is there a way to solve this error?The Critical message is:An application fault occurred: ('query/api.py searchData|4617', "<type 'exceptions.AttributeError'>", "'NoneType' object has no attribute '__len__'", '[util/Aquarium.py screen...

maraskoni by Level 1
  • 472 Views
  • 0 replies
  • 0 Helpful votes

Hello , we have a cluster ESAs and one SMA all VMs . Updated the ESAs to Version: 15.5.1-055  ...no issues .. worked fineAfter that updated the SMA from :Version: 15.0.0-334 to  AsyncOS 15.5.1 build 024 as offered as GD in the upgrade path. Update se...