Deprecation of TLS 1.0 and 1.1 for Hosted Exchange
Incident Report for Zix | AppRiver
Posted Mar 11, 2024 - 10:30 CDT
We are continuing to work on a fix for this issue.
Posted Mar 11, 2024 - 10:29 CDT
Posted Sep 11, 2023 - 17:17 CDT
What changes are occurring?
Late last year we started alerting all Hosted Exchange customers of the upcoming deprecation of TLS 1.0 and 1.1. Hosted Exchange will be disabling TLS 1.0 and TLS 1.1 and moving all of our online services to TLS 1.2 as of September 11, 2023.

How does this affect me?
As of September 11, 2023, Hosted Exchange will no longer support TLS 1.0 and 1.1. By September 11, 2023, all client and browser combinations should use TLS version 1.2 (or a later version) to ensure connection without issues to our services. This may require updates to certain clients and browser combinations. If you do not update to TLS version 1.2 (or later) by September 11, 2023, you may experience issues when connecting to Hosted Exchange. If you experience an issue related to the use of an old TLS version after September 11, 2023, you will be required to update to TLS 1.2 as part of the resolution.

What do I need to do to prepare for this change?
We recommend you proactively address weak TLS usage by removing TLS 1.0/1.1 dependencies in your environments and disabling TLS 1.0/1.1 at the operating system level where possible. Clients using Outlook 2010 for Windows or Outlook 2011 for Mac will need to change to be replaced with newer versions. Clients using Outlook 2013 SP1 (or higher), Outlook 2016 for Mac will need to ensure that they are up to date. Windows 7 users can use TLS 1.2 client applications and browsers if changes are made using the following Microsoft guidance at Update to enable TLS 1.1 and TLS 1.2 as default secure protocols in WinHTTP in Windows (

Posted Jun 26, 2023 - 14:16 CDT
This incident affected: Secure Hosted Exchange (Exchange 2013/2016+ (EXG7)).