Disabling Uploading and Downloading Files in Chat Rooms
Lync Server 2013
Topic Last Modified: 2012-09-12
By default, users can upload and download files in the messages that they post. You can disable this functionality and prevent users from uploading and downloading files in two ways:
Prevent all users from uploading and downloading files in a certain Persistent Chat room or chat room category.
Prevent a certain user from uploading and downloading files in any chat room. The user cannot upload and download files in any chat room, including chat rooms that allow file uploading and downloading.