The Esri Maps for Dynamics CRM application is now in Mature Support. It will be available for download until June 30, 2016.
If you are looking to integrate your Microsoft Dynamics CRM data with ArcGIS, you can
If you have already downloaded Esri Maps for Dynamics CRM, you can continue to use it.
Please note: Esri Maps for Dynamics CRM moved to Mature Support. Read more about its product life cycle support status.