You can find this information in the file’s properties. Most ACSM files are Misc Files, but there’s a chance it might be another type. If none of the above programs will open your ACSM file, check the file type to make sure you have a program that can open that type of file. Try one of the most common programs: Adobe Digital Editions Adobe Content Server Message. There are several popular programs that can be used to open a ACSM file. If the ACSM file doesn’t open when you double-click it, you probably don’t have the right program on your computer. If you have the right program installed, it should open the file automatically. Locate the ACSM file icon and double-click it. Optional Offer for File Magic by Solvusoft | EULA | Privacy Policy | Terms | Uninstall Step 1: Double-click the file. Download Universal File Viewer (File Magic)