Your best bet for compatibility would be to try the MS Outlook VBO off the Digital Exchange. The dll file it references is still 32-bit, but it also takes out any custom unstable code that Blue Prism integrated.
Unfortunately, Blue Prism's automation engine is still 32-bit, even if you grab the 64-bit installer. any 64-bit dll files you find will not be compatible. (Fingers crossed for a 64-bit built in version 7!)
Alternatively, you might be able to interface with OWA's API or an SMTP hook.