Slow / Sluggish mouse movement for RDP to Windows 2012 R2.

Published RDP connection from Xenapp 6.5 to a Windows 2012 R2 server will come up with an slow and sluggish mouse pointer.

To solve this issue

Turning off mouse shadows on the RDP destination solves the issue for us.

launch the ICA-published mstsc to connect to the 2012 R2 server,
right click the start button -> System -> Advanced System Settings -> Performance Settings ->

uncheck “Show Shadows Under Mouse Cursor” -> OK,

if this was allready unchecked, check it, apply settings and uncheck again,

the mouse pointer immediately changes back to normal performance.