Preventing Offline Files from Caching Certain Files

by Chris Sanders [Published on 1 March 2007 / Last Updated on 1 March 2007]

Certain files can cause headaches for the offline file backup system. Using group policy we can all together exclude these files.

The use of offline files can make working remotely all that much easier. This process copies files from a shared network location to a local computer, and visa versa. Obviously, the larger the files being copied, the longer the synchronization of offline files will take. It is because of this that it is sometimes better to exclude certain files type all together. Audio and video files are a good example of files that have the propensity to be very large and can be excluded with ease.

Begin this process by opening your preferred group policy editing tool and creating a new group policy object and browsing to computer configuration > administrative templates > network > offline files. Here you will find a setting labeled “Files not cached”. Here you can specify the extensions of the types of files you do not want cached when offline synchronization occurs. By adding extensions such as AVI, MP3, or WMV you should eliminate a lot of potential problem files.


Chris Sanders is the network administrator for one of the largest public school systems in the state of Kentucky. Chris's specialties include general network administration, windows server 2003, wireless networking, and security. You can view Chris' personal website at

The Author — Chris Sanders

Chris Sanders is a network security analyst for EWA Government Systems Inc. Chris is the author of the book Practical Packet Analysis as well as several technical articles. His personal website at contains a great deal of information, articles, and guides related to network administration, network security, packet analysis, and general information technology.

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