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Adobe is included and does ship on the Windows Server 2016 media. It can be installed by adding the Remote Desktop Session Host (RDSH) role.
1. Go to Add roles and Features
2. Select Role Based
3. Select your server from server pool.
4. Select "Remote Desktop Services"
5. Select "Remote Desktop Session Host"
Just hit next until it installs and restarts the computer and now Packet Tracer 3.2 should work.