1. Use IE Browser Version is 10 or 11
2. Login with System admin user
3. Create Test Record in any Entity like Account, Contact
4. Social pane -> Activity -> Email
5. Create any email -> add any attachment -> send that email
6. Logout from system admin account
7. Login again with user who has sales person security role
8. Open the same record (Test)-> open the same email from social pane�s activity
9. Try to delete attachment -> but no action taken place.
10. Click on attachment and open in new window, you will find Remove tab to delete that attachment
11. if you try to delete by clicking on remove tab then also no action attachment
12. but if you press F12 and start the IE Debugging
13. Click on the mouse sign to use Dom explorer to select an element
14. Select Remove tab then code for Remove button will highlight as shown in above screen shots

15.

16. Changed the above code; button function from disabled to enabled as shown in below

17.
18. Try to delete the attachment by clicking on Remove tab, attachment successfully delete.
19. Login again with system admin and check with same email but we cannot find any attachment, please check below screen shot.
20. Checked in Audit history for Accounts and Activity but did not find any.