Dear all,
I want to upgrade Ironport from version 8 to version 9. There are 4 virtual Email Security Appliances in a cluster.
The question is, can I just upgrade the Cisco Ironport from AsyncOS 8.5.6 directly to AsyncOS 9 or is there any pre-requisite(s)? Is there any configuration change? Should I exclude it first, etc?
I hope to get some advices.
Any kind of help will be appreciated.
Thank you very much.
jaksptr