Open Internet Information Services (IIS) Manager from the Administrative Tools window. Select Web Service Extensions. Select Add a new Web service extension
From the New Web Service Extension window, enter ezs.exe into the Extension name box. Select Add and enter the path to the ezs.exe program on the server. In the example the directory is located at
C:\Inetpub\Scripts\ezs.exe
Also, select the option Set extension status to Allowed