File Extension CMN

.CMN File

File extension: CMN
File type: Collection Membership Update


Notes about the CMN file extension:



To open this file type, a required software must be installed. Without it you only see a Windows message "The following file cannot be opened" (Windows 7) or "How do you want to open this file?" (Windows 10) if you double-click the file. There click on "More apps" and choose a suitable software to view such files on your PC or from email attachments.

The CMN file type is primarily associated with 'Systems Management Server (SMS)' by Microsoft Corporation. With SMS you can provide your organization a change and configuration management solution to deliver relevant software and updates to users of Microsoft and third-party applications.

Detailed information for file extension CMN:


Primary association: Systems Management Server (SMS)
Company: Microsoft Corporation

Other applications associated with file type CMN:

  • Unknown Apple II File ((found on Golden Orchard Apple II CD Rom))



To change file associations press Windows Key + X and then Apps and Features > Default apps > Choose default apps by file type. Invalid file associations could be the result of underlying issues within your Windows PC.

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