Hi,
We want to block .mp3 .avi extension in my organization.
Check this download.
https://www-secure.symantec.com/connect/downloads/block-access-extension-mp3-mp4-mpg-mpeg-flv
Use following steps
Select the Block Access in the “Read Attempt” and “Create, Delete or Write Attempt”. Select Ok.
Assign the policy to the required Groups.
Thanks
Agree with Jackie
thanks all of you...