I'm wondering if there is a newer version of the Acrobat Customization Wizard DC. Currently, have CustWiz2100720091_en_US_DC installed. Was able to successfuly build and use an MST for Adobe Acrobat DC 22.001.20169 (x64).
Problem comes with building an MST for Adobe Acrobat Reader DC 22.001.20169 (x64). Downloading and executing AcroRdrDCx642200220169_en_US.exe successfully installs. Extracting the exe and run setup.exe works. Build the MST and while the install completes, post-install testing seems to show that the brower integration does not finish.