Merge pull request #27465 from neal-timpe/ossmdoc-138

OSSMDOC-138

Author: JStickler

modules/jaeger-install-elasticsearch.adoc

@@ -36,7 +36,12 @@ If you have already installed the Elasticsearch Operator as part of OpenShift cl
 . Click *Install*.
 
 . On the *Install Operator* page, select the *A specific namespace on the cluster* option and then select *openshift-operators-redhat* from the menu.
-
++
+[NOTE]
+====
+The Elasticsearch installation guide says you must specify the *openshift-operators-redhat* namespace for the Elasticsearch operator for {ProductName}.
+====
++
 . Select the *Update Channel* that matches your {product-title} installation.  For example, if you are installing on {product-title} version 4.6, select the 4.6 update channel.
 
 . Select the *Automatic* Approval Strategy.