When configuring multiple connections to different CRM organizations (or different CRM instances), all domains mapped to CRM security providers will contain users and roles that come only from the first initialized CRM connection. All other CRM connections will be ignored.
This applies to all versions of Dynamics CRM Campaign Integration.
When running CRM Security Provider 2.0 or later, apply the following patch:
<add name="crm" type="CRMSecurityProvider.Support.CRMMembershipProvider, Sitecore.Support.422079" .../> <add name="crm" type="CRMSecurityProvider.Support.CRMRoleProvider, Sitecore.Support.422079" .../> <add name="crm" type="CRMSecurityProvider.Support.CRMProfileProvider, Sitecore.Support.422079" .../>
For earlier versions, update your software to the CRM Security Provider 2.0 or later, and apply the patch above.