Here are the details regarding Microsoft provided support for Microsoft Dynamics CRM: Version Lifecycle Start Date Mainstream Support End Date Extended Support End Date Dynamics CRM 4.0 February 29th 2008 April 9th 2013 April 10th 2018 Dynamics CRM...
Roberto Nocera's insight:
Important information aboutt Microsoft Dynamics CRM Support Lifecyle
Microsoft Dynamics CRM Online Spring ‘14 and Microsoft Dynamics CRM 2013 Service Pack 1 have many new features and updates for your CRM deployment. Some of these features are disabled by default to prevent disrupting your CRM experience