It's a drop down box should the field be enabled?

Yes our phones are still experiencing intermittent freezing we have 8851 and 8861 on 11-7-1-17.  We have pushed 12-0-1-11 to an 8851 and are monitoring.

Hello I am having same issues and wondered where you got the ES file from?

Is the ES available in the dowloads section of cisco?