Download here:
http://www.microsoft.com/en-us/download/details.aspx?id=45012
Microsoft Dynamics CRM Server 2015 Product Key trial:
90-day trial keys.
Microsoft Dynamics CRM Workgroup Server 2015 (5 CAL limit): XY8GN-DF2MC-FV482-YM9YP-HH6H2
Microsoft Dynamics CRM Server 2015 (no CAL limit): C6BDP-T6NK9-8TXJP-36WTB-TXW7V
Microsoft Dynamics CRM Software Development Kit (SDK) for CRM Online and on-premises CRM 2015:
