PUT https://service.search.windows.net/indexers/myindexer?api-version=[api-version]
Content-Type: application/json
api-key: [admin key]
    {
        "dataSourceName" : "mydatasource",
        "targetIndexName" : "myindex",
        "parameters" : { "maxFailedItems" : 10, "maxFailedItemsPerBatch" : 5 }
    }