Inline w/ my earlier response --- if you aren't getting the plugin to load - the only other option is the subject line tagging, using [ENCRYPT] or specified content/message filter driven encryption once the message hits the ESA.
From my win 8.1/office2013 test - I was able to use both the plug-in driven encyption and subject line tag to process through my virtual ESAs encrption profile.
The one catch I see w/ the 7.3 plug-in in my win 8.1/office2013 test was getting the signed BCE XML added. The plug-in allows the de-cryption of the recieved CRES signed/encrypted message, but the email is automatically opened, and does not present the recognition of the XML file and option to save that information to Outlook --- thus, installing the XML and enabling the encryption ability. I had to manually save the XML, and then find the hidden C:\ProgamData\Cisco\Cisco IronPort Email Security Plug-In\<userID> folder... and then do the manual rename of my BCE_signed.XML to config_1. After restart of Outlook, this loads fine - and enables the Encrypt button when using New Email.
I just loaded up 8.1, Office 2013 - added in my test gmail account, and then loaded the 7.3 (Version: 184.108.40.206) plug-in - no issues.
I had to step through the pre-reqs and install Java, for the .NET framework, I went through the control panel > programs > programs & features > Turn Windows features on or off... and selected the .NET Framework 3.5 option, since Win 8.1 has 4.5 installed as default...
After, w/ the 7.3 plug-in install, ran fine w/o issue... Outlook loads... seeing Cisco Email Security section, w/ the Spam/Not Spam/Virus/Phish options... Encrypt button shows on New Email.
Per plug-in diagnostics:
[Machine info:] --------------- Runtime version: 2.0.50727.8000 OS version: Microsoft Windows NT 6.2.9200.0 CurVer: [VALUE NOT FOUND] Current user: Robert Machine name: WIN_8_1 Current directory: C:\Users\Robert\Documents
DocumentationCode download linksGoalRequirementLimitationsSupported ISR and UCS-E ModelSupported ISRG2 and UCS-E Blades:Supported ISR4K and UCS-E Blades:Step by Step ConfigurationConfigure one of the connectivity options to access the Cisco IMC from the n...
Firepower Threat Defense (NGFWv) on UCS E-series - Transparent Mode in HA
DocumentationCode download linksGoalRequirementLimitationsSupported ISR and UCS-E ModelSupported ISRG2 and UCS-E Blades:Supported ISR4K and UCS-E Blades:Step by Step ConfigurationCo...
I am currently unable to specify "crypto keyring" command when configuring VPN connection on my cisco 2901 router.
The following licenses have been activated on my router :