Starting today, you have greater control over data movement to and from your users’ Amazon AppStream 2.0 streaming sessions via clipboard. You can independently specify the maximum number of characters (up to 20,971,520) that can be transferred out of and/or into the session via the clipboard functionality. For example, you could let your users copy a maximum of 300 characters from their AppStream 2.0 session on to their personal devices while setting a different limit of 100 characters for data from their personal device to AppStream 2.0 and vice-versa. You still have an ability to completely block the clipboard functionality, if so desired. This new configuration will allow customers flexibility in controlling data exfiltration.
Source:: Amazon AWS