diff --git a/search-services/alfresco-search/src/main/java/org/alfresco/solr/tracker/DocRouterFactory.java b/search-services/alfresco-search/src/main/java/org/alfresco/solr/tracker/DocRouterFactory.java
index 1399a6316..6ce926dbe 100644
--- a/search-services/alfresco-search/src/main/java/org/alfresco/solr/tracker/DocRouterFactory.java
+++ b/search-services/alfresco-search/src/main/java/org/alfresco/solr/tracker/DocRouterFactory.java
@@ -62,10 +62,10 @@ public class DocRouterFactory
                 LOGGER.info("Sharding via PROPERTY");
                 return new PropertyRouter(properties.getProperty("shard.regex", ""));
             case LAST_REGISTERED_INDEXING_SHARD:
-                LOGGER.info("Sharding via LAST_REGISTERED_INDEXING_SHARD");
+                LOGGER.warn("Sharding via LAST_REGISTERED_INDEXING_SHARD: Note this is available at the moment as an Early Access/preview feature!");
                 return new ExplicitShardIdWithStaticPropertyRouter();
             case EXPLICIT_ID_FALLBACK_LRIS:
-                LOGGER.info("Sharding via EXPLICIT_ID_FALLBACK_LRIS");
+                LOGGER.warn("Sharding via EXPLICIT_ID_FALLBACK_LRIS: Note the LRIS Router (which is part of this composite router) is available at the moment as an Early Access/preview feature!");
                 return new DocRouterWithFallback(
                         new ExplicitShardIdWithDynamicPropertyRouter(false),
                         new ExplicitShardIdWithStaticPropertyRouter());
diff --git a/search-services/alfresco-search/src/main/java/org/alfresco/solr/tracker/ExplicitShardIdWithStaticPropertyRouter.java b/search-services/alfresco-search/src/main/java/org/alfresco/solr/tracker/ExplicitShardIdWithStaticPropertyRouter.java
index 62e847029..d811809c1 100644
--- a/search-services/alfresco-search/src/main/java/org/alfresco/solr/tracker/ExplicitShardIdWithStaticPropertyRouter.java
+++ b/search-services/alfresco-search/src/main/java/org/alfresco/solr/tracker/ExplicitShardIdWithStaticPropertyRouter.java
@@ -24,11 +24,25 @@ import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
 
 /**
- * Routes the incoming nodes (not ACLs!) on the last registered indexing shard (LRIS).
+ * Routes the incoming nodes (not ACLs!) on the shard explicitly indicated in {@link Node#getExplicitShardId()} method.
  * The access control information is duplicated in each shard.
  *
+ * <p><br/><b>
+ *  WARNING: This {@link DocRouter} is part of an early access/preview routing feature called
+ *  Last-Registered-Indexing-Shard (LRIS), where the {@link Node#getExplicitShardId()} is filled with the identifier of
+ *  the last Master Shard which subscribed the cluster.
+ *
+ * </b><br/><br/>
+ * </p>
+ *
+ * Specifically, until the whole feature will be officially released, the LRIS document routing feature is not compatible
+ * with the "Purge" action on the Alfresco Admin Console.
+ * Note that at time of writing, the "Purge on startup" option in the Admin Console is enabled by default so prior to
+ * build your search cluster, you have to make sure that option is unchecked.
+ *
  * @author Elia
  * @author agazzarini
+ * @since 1.4
  */
 public class ExplicitShardIdWithStaticPropertyRouter extends ComposableDocRouter
 {