Try the following steps :-
Go to Microsoft Dynamics CRM web application.Click on Start and Run, type regedit in the Open box, click on OK.
Locate the following registry subkey:
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\MSCRM
Right-click on configdb, and click on Modify.
In the Value data box, change the data source to the name of the new virtual SQL Server (or current SQL Server databases were moved to).
The string value in the Value data box should resemble the following: Data Source=NewSQLServer;Initial Catalog=MSCRM_CONFIG;Integrated Security=SSPI
start Deployment Manager on the computer, which is running the Microsoft Dynamics CRM Server web application.
Expand the Deployment Manager node, and click on Organizations.
Disable the organization,if not
Ignore the warning
In the list of organizations, right-click on the organization, and click on Edit.
In the SQL Server box, type the virtual SQL Server name for the SQL Server cluster which is already created.
(If not using a SQL Server cluster, just type the SQL Server name or SQL Server name and instance name here).
click on Next, Apply and Finish
Right-click on the organization to enable it.
Don't fprget to reset the IIS services on the computer that is running IIS where the Microsoft Dynamics CRM Server web application is installed.
