: Users are advised not to optimize or reduce the file size of PDFs containing digital signatures, as it can invalidate the cryptographic checksum and cause formatting errors. For the most stable performance, Adobe recommends using the Official Offline Installers
Approximately 4.5GB of available space is needed for the full installation. Adobe Help Center Key Features of the 2021 Release Adobe Acrobat Pro DC User Guide | Community adobe acrobat pro dc 202100720102 x32 x64m full