Any Organization wanting to implement Dynamics CRM will almost certainly be using pre-existing data. So one of the important things to consider will be Data Migration and Data Integration. As applied to traditional Windows / Web projects the tasks that can be identified are, those who have worked with SQL Server extensively would be familiar with the approach listed below.
- Choice of tool(s)
- Source Data Analysis
- Mapping Document and Integration Scripts
- Perform Data Transfer.
The following link has a very good explanation in this area: