How to open Adobe Content server message .acsm files
Have you had trouble opening the acsm file on your computer? What are acsm files? We explain what they are and recommend software that we know will open them.
What is acsm file?
E-books vouchers intended for the Adobe Digital Editions digital content management platform use files with the acsm file extension, which essentially act as purchase tickets.
Adobe Content server message description
ACSM files are used for management of content from Adobe Digital Editions platform.
The data in ACSM format are used to activate and download Adobe DRM protected content. It is not the actual eBook file itself, but a license file that authorizes the user to download the eBook.
The ACSM file is downloaded when a user purchases an eBook online and then opened with Adobe Digital Editions, which downloads the actual eBook.
Suggested software to open acsm file

Adobe Digital Editions
Electronic book viewer based on Flash, a successor to Adobe eBook Reader

Adobe Digital Editions for Mac
Mac version of Adobe's free e-book viewer and manager

Adobe Creative Cloud
Latest, subscription based productivity suite from Adobe