Following the release notes, Alfresco Search Enterprise 3.0 with Elasticsearchis only supoported by enterprise version:
. Support for Alfresco Search Enterprise 3.0 with Elasticsearch
. Support for Direct Access URLs for Content Stores using AWS S3 storage
. Secure SDK events gateway
. Shared Secret HTTP Header protocol for Repository-SOLR communication
. Alfresco In-Process SDK 4.3
. Alfresco Out-Of-Process SDK 5.1.1
I guess you can ask for this in the official partner support page.