Marketo natively supports the following versions of Microsoft Dynamics CRM:
Microsoft Dynamics CRM Online. Authentication types supported: Windows Live ID and Office 365
Microsoft Dynamics CRM 2011 with IFD
Microsoft Dynamics 2013 with IFD.
For Dynamics OnPremise (2011 and 2013) the authentication type we support is ADFS (Active Directory Federated Services). We support ADFS 2.0 and 2.1 and will always support the latest version publicly available ADFS.