If you're looking to remove the "Request Signatures" button, I found one possible solution for Microsoft Windows:
Get a copy of the old version of the PDFMOfficeAddin.dll file from an older (version 19.x) version of Adobe Acrobat DC and overwrite the current .dll that changed the look of the icons in the ribbon to something generic and unnecessarily added the "Request Signatures" button.
This .dll is located under C:\Program Files (x86)\Adobe\Acrobat DC\PDFMaker\Office\PDFMOfficeAddin.dll (for 32-bit installs of Word) and ...\x64 (for 64-bit installs of Word) respectively.
In my testing, I have not found any issues, and the original Adobe logo icon goes back to the way it was, while the "Request Signatures" button is nowhere to be found. It's almost certain this .dll will get overwritten during every Adobe Acrobat DC update, so this isn't really a long-term fix, but at the very least a method to put things back to the way they were.
If you're looking to remove the "Request Signatures" button, I found one possible solution for Microsoft Windows:
Get a copy of the old version of the PDFMOfficeAddin.dll file from an older (version 19.x) version of Adobe Acrobat DC and overwrite the current .dll that changed the look of the icons in the ribbon to something generic and unnecessarily added the "Request Signatures" button.
This .dll is located under C:\Program Files (x86)\Adobe\Acrobat DC\PDFMaker\Office\PDFMOfficeAddin.dll (for 32-bit installs of Word) and ...\x64 (for 64-bit installs of Word) respectively.
In my testing, I have not found any issues, and the original Adobe logo icon goes back to the way it was, while the "Request Signatures" button is nowhere to be found. It's almost certain this .dll will get overwritten during every Adobe Acrobat DC update, so this isn't really a long-term fix, but at the very least a method to put things back to the way they were.