Below are the steps to modify the Report Server URL and SQL Server for an Organization in Microsoft Dynamics CRM 2013 / 2011. This assumes that the report server is already installed and configured.
1. Open CRM Dynamics Deployment Manager
2. Select the Organization
3. Right Click and Disable the Organization.

Disable Organization

Disable Organization

4. Right Click again and Click on “Edit Organization”

Edit Organization

Edit Organization

5. Modify the URL of the SQL Server and Reporting Services URL and respond to the Wizard.

Deployment Wizard

Deployment Wizard

6. Enable the Organization.