I originally posted this back in March 2015 and the thread was closed with no resolution. I'm using 1Password for Windows Version 184.108.40.2064 within two Windows 10 virtual machines on my Mac - one running Parallels Desktop Version 11.2.0 (32581) and the other running VMWare Fusion Professional Version 8.1.1 (3771013). On Parallels the version of Internet Explorer I have is 11.420.10586.0, and on VMWare Fusion the Internet Explorer version is the same. The problem I encounter is when I want to access a site from within 1Password on either of the two Windows virtual machine, say Facebook, when 1Password opens the site within Internet Explorer it places my Facebook password in the "Email or Phone" (user name) text box. I have no idea what gets populated in the "Password" text box. The login to the site fails, of course. This happens regardless of which site I attempt to access, be it Facebook or any other site for which I use 1Password.
1Password Version: 220.127.116.114
Extension Version: Not Provided
OS Version: Windows 10 Pro
Sync Type: Not Provided