Login to Exchange Control Panel, Create a Conferencing policy with appropriate features required,
Note: File Transfer options doesn’t come under client policies
Disable peer to peer file transfer.
To Assign to a User –
Grant-CsConferencingPolicy -Identity Satheshe@careexchange.in -PolicyName “Conferencing – Disabled – No P2P”
Note We disabled only P2PFileTransfer, Still if the user can join a conference call and send and receive files.
This can be disabled as well EnableFileTransfer setting to $false