added links to preview program signup

Author: mimig1

articles/cosmos-db/cassandra-introduction.md

@@ -21,8 +21,7 @@ ms.author: mimig
 
 [Azure Cosmos DB](introduction.md) provides the Cassandra API (preview) for applications that are written for Apache Cassandra that need premium capabilities like:
 
-* [Turnkey global distribution](distribute-data-globally.md).
-* [Dedicated throughput](partition-data.md) worldwide.
+* [Scalable storage size and throughput](partition-data.md).
 * Single-digit millisecond latencies at the 99th percentile.
 * Guaranteed high availability.
 

articles/cosmos-db/create-cassandra-nodejs.md

@@ -28,9 +28,9 @@ This quick start demonstrates how to create an Azure Cosmos DB account for the [
 
 ## Prerequisites
 
-* Before you can run this sample, you must have the following prerequisites:
-	* [Node.js](https://nodejs.org/en/) version v0.10.29 or higher
-	* [Git](http://git-scm.com/)
+* Access to the Azure Cosmos DB Cassandra API preview program. If you haven't applied for access yet, [sign up now](https://aka.ms/cosmosdb-cassandra-signup).
+* [Node.js](https://nodejs.org/en/) version v0.10.29 or higher
+* [Git](http://git-scm.com/)
 
 [!INCLUDE [quickstarts-free-trial-note](../../includes/quickstarts-free-trial-note.md)] 
 

includes/cosmos-db-create-dbaccount-cassandra.md

@@ -8,7 +8,7 @@
     Setting|Suggested value|Description
     ---|---|---
     ID|*Enter a unique name*|Enter a unique name to identify this Azure Cosmos DB account. Because *documents.azure.com* is appended to the ID that you provide to create your contact point, use a unique but identifiable ID.<br><br>The ID can contain only lowercase letters, numbers, and the hyphen (-) character, and it must contain 3 to 50 characters.
-    API|Cassandra (wide-column)|The API determines the type of account to create. Azure Cosmos DB provides five APIs to suits the needs of your application: Gremlin (graph), MongoDB, SQL (DocumentDB), Table (key-value), and Cassandra, each which currently require a separate account. <br><br>Select **Cassandra (wide-column)** because in this quickstart you are creating a wide-column database that is queryable using CQL syntax.<br><br>[Learn more about the Cassandra API](../articles/cosmos-db/cassandra-introduction.md)|
+    API|Cassandra (wide-column)|The API determines the type of account to create. Azure Cosmos DB provides five APIs to suits the needs of your application: Gremlin (graph), MongoDB, SQL (DocumentDB), Table (key-value), and Cassandra, each which currently require a separate account. <br><br>Select **Cassandra (wide-column)** because in this quickstart you are creating a wide-column database that is queryable using CQL syntax.<br><br>If Cassandra (wide-column) is not displayed in your list, then you need to [apply to join](https://aka.ms/cosmosdb-cassandra-signup) the Cassandra API preview program.<br.<br> [Learn more about the Cassandra API](../articles/cosmos-db/cassandra-introduction.md)|
     Subscription|*Your subscription*|Select Azure subscription that you want to use for this Azure Cosmos DB account. 
     Resource Group|*Enter the same unique name as provided above in ID*|Enter a new resource-group name for your account. For simplicity, you can use the same name as your ID. 
     Location|*Select the region closest to your users*|Select geographic location in which to host your Azure Cosmos DB account. Use the location that's closest to your users to give them the fastest access to the data.