The following query on the EnterpriseVaultDirectory database should show all the archives that have ever been syncronised by a Vault Cache sync.
select ArchiveName from ArchiveView where RetainArchiveHistory <> 0
The issue in the TECH note would have prevented the installer completing sucessfully - it would have rolled back out of the install.
As you have the add-in listed in Outlook this is likley to be a different problem.
I assume that you have tried to ...
From an EV perspective I don't see why you should need to roll out at the mailbox level as long as you want all Exchange 2013 users to get the App, and there is only one EV server. Rolling out as an org app makes management of the app easier when use...
The mailbox is used to generate a manifest that will cause the client to load the EV Mail App from the EV storage server that holds the EV archive for the given mailbox. This is an optimisation for when the EV Mail App is configured for individual us...
You do need to setup HTTPS access to the EnterpriseVault virtual directory to use the Office Mail App, however you don't need to change over the rest of EV to use HTTPS as long as you leave HTTP configured on the virtual directory.