I’ve been very frustrated trying to disable Acrobat’s Outlook plugin (toolbars, additional menu) and since google found no solution I’m posting what worked for me.

1. Find the location of your PDFMOutlook.dll library. This will be presumably “C:\Program Files\Adobe\Acrobat 9.0\PDFMaker\Mail\Outlook\”.
2. Unregister the DLL from the system–run the following command:

   regsvr32 /u "C:\Program Files\Adobe\Acrobat 9.0\
PDFMaker\Mail\Outlook\PDFMOutlook.dll"

3. Rename the file to “PDFMOutlook.dll.old” for instance
4. Restart your now clean Outlook.

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