Cisco Cisco Email Security Appliance C190

You can upgrade to release 8.5.5-280 from the following versions: 

8.5.0.473

8.0.1-023 

To ensure a successful upgrade, you must complete some steps before you start the upgrade process. For 
details on these prerequisites, see 

.

Read through and consider the installation and upgrade impacts listed in this section. 

When you upgrade AsyncOS for Email from the web interface or Command Line Interface (CLI), the 
configuration is saved to file in the /configuration/upgrade directory. You can access the upgrade 
directory using an FTP client. Each configuration file name is appended with the version number, and 
passwords in the configuration file are masked so they are not human readable.

You must be logged in as the admin to upgrade. Also, you must reboot the appliance after upgrading.

If you are deploying a virtual appliance, see the Cisco Content Security Virtual Appliance Installation 
Guide. 

If you are switching from a physical appliance to a virtual appliance, you will need to convert your 
configuration file to an AsyncOS 8.0 virtual appliance configuration file. For information, see the 
Release Notes for Configuration Migration Tool 1.0 for Cisco Content Security Virtual Appliances. You 
can import the AsyncOS 8.0 virtual appliance configuration file into a virtual appliance running 
AsyncOS 8.5. 

Please contact Cisco TAC for information required to provision your virtual appliance. 

Please be aware of the following upgrade impacts: