CrmSvcUtil.exe - CRM Dynamics 2011/2013/2015 Code Generation Tool - Early Bound

CrmSvcUtil.exe command-line tool, called the Microsoft.Xrm.Client.CodeGeneration extension, which you can use to generate the data context and data transfer object classes for your Microsoft Dynamics CRM organization.

CrmSvcUtil.exe /codeCustomization:"Microsoft.Xrm.Client.CodeGeneration.CodeCustomization,Microsoft.Xrm.Client.CodeGeneration" /url:http://<Server_Name>/<Organization_Name>/XRMServices/2011/Organization.svc /username:uid /password:pwd /out:"CRMEntities.cs" /namespace:CRM.Entities /serviceContextName:CrmServiceContext

Generate Custom Action as Early Bound (parameter /generateActions)

CrmSvcUtil.exe /url:http://<Server_Name>/<Organization_Name>/XRMServices/2011/Organization.svc /username:uid /password:pwd /out:"c:\crmprojects\CRMEntities.cs" /namespace:DNS.CRM.Entities /serviceContextName:CrmServiceContext /generateActions

Reference - http://msdn.microsoft.com/en-us/library/ff681563.aspx