Exchange 2013/2016 on Xenapp 7.8
1.Start Registry Editor (Regedit.exe).
2.Locate and then click the following registry subkey:
HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\Tcpip\Parameters\Interfaces
the interfaces will be listed underneath by automatically generated GUIDs like {064A622F-850B-4C97-96B3-0F0E99162E56}
3.Click each of the interface GUIDs and perform the following steps:
a. On the Edit menu, point to New, and then click DWORD value.
b. Name the new value TcpAckFrequency, and assign it a value of 1.