One issue we’ve run into with two of our Microsoft Dynamics CRM 4.0 Online customers pertains to importing their customizations into a new CRM Online instance. The error you receive when you attempt to import the customizations is “Failure: lead-contact: This attribute map is invalid. A valid attribute map must meet these requirements: - The data type must match. - The length of the target attribute cannot be shorter than the source attribute. - The format should match. - The target attribute must not be used in another mapping. - The source attribute must be visible on the entity form. - The target attribute must be a field a user can enter data into. - Address ID values cannot be mapped.”