RemoteApp Slow after Windows10 1803 update on Server 2012 R2

As the title suggests, after updating Windows 10 computers to 1803, users have reported slow RemoteApp sessions.

You can try disabling Remote FX, but user reports suggest this causes further issues.

The easiest fix is to copy mstsc.exe and mstscax.dll from a 1709 build and replace the files on 1803. We have confirmed this works.

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