How do enable Extreme Search command in ES App?

[urbach]

After updating to ES App version 5.3.1, the extreme search commands no longer exist.

An error message is shown that the command is not found.

e.g.

Search: Access - Authentication Failures By Source - Context Gen

Unknown search command 'xsupdateddcontext'.

[lkutch_splunk]

The Splunk Machine Learning Toolkit (MLTK) replaced Extreme Search:
https://docs.splunk.com/Documentation/ES/6.1.1/Admin/MLTKoverview

[richgalloway]

Extreme Search is not replaced until ES 6.0.