After you install the Microsoft Outlook plug-in, the Acrobat.com tab is missing in Outlook. The "Acrobat.com Add-in for Microsoft Outlook Beta" Add-in is listed in Disabled Application Add-ins.
By default, the installation folder is located at: C:\Program Files (x86)\Adobe\Acrobat.com Add-in for Microsoft Outlook. When correctly installed, the folder contains seven *.dll files.
The plug-in appears when you create a message in Outlook. However, in certain circumstances the plug-in is disabled and the Acrobat.com tab isn't visible.
The Acrobat.com Add-in for Outlook does not work behind a proxy server.