Error message when you log on to any organization in Microsoft Dynamics CRM 4.0: "The specified organization is disabled"

Consider the following scenario. You create two organizations in Microsoft Dynamics CRM 4.0. Then, you disable the default organization. In this scenario, when you log on to any organization in Microsoft Dynamics CRM, you receive the following error message:
Error: The specified organization is disabled

This problem occurs because a valid default organization does not exist in Microsoft Dynamics CRM.

To resolve this problem, use one of the following methods.

Method 1: Enable the default organization

Start -> Programs -> Microsoft Dynamics CRM -> Deployment Manager.
Click Organizations, right-click the default organization, and then click Enable.
Reset Internet Information Services (IIS). To do this, Start -> Run, type iisreset, and then click OK.


Method 2: Set another organization as the default organization

Start -> Programs -> Microsoft Dynamics CRM -> Deployment Manager.
Click Organizations, right-click an organization, and then click Set as Default Organization.
Reset Internet Information Services (IIS). To do this, Start -> Run, type iisreset, and then click OK.