Sometimes simple questions like this one lead to unexpected results, or at least, results which are open to debate. The question is:
Where does the Enterprise Vault Outlook Add-in install to?
The answer is, of course, that it depends on the bitness of Windows and the bitness of Outlook.
64 Bit Windows and 32 Bit Office
\Program Files (x86)\Enterprise Vault\EVClient
32 Bit Windows and 32 Bit Office
\Program Files\Enterprise Vault\EVClient
I'd say both of those are 'expected'. The slightly odd one is:
64 Bit Windows and 64 Bit Office
\Program Files (x86)\Enterprise Vault\EVClient
.. but most of the binaries themselves are stored in an x64 subfolder
