If you already have Acrobat Pro DC 2015 installed, you can check for the final available updates (the last major update was version 2015.006.30527 in August 2020): Open Acrobat Pro DC. ) and select Check for Updates
Before you proceed, check your exact version: adobe acrobat pro dc 2015 update download
The built-in "Check for Updates" button will likely fail. , download the latest .msp patch file manually, and install it while the application is closed. If you already have Acrobat Pro DC 2015
Look for the .msp (Windows) or .dmg (Mac) file. You generally want the highest version number available (e.g., AcrobatDCUpd1500630033.msp or similar). AcrobatDCUpd1500630033.msp or similar).