Since Dynamics CRM 2011, Microsoft Dynamics have decided to discontinue their previous specific professional qualifications such as MCTS.
These older certifications have now been replaced by Microsoft Specialist exams. The list of current available exams is listed below:

MB2-704 Microsoft Dynamics CRM Application exam

Accompanying course – CRM 2015 Applications

MB2-707 Microsoft Dynamics CRM Customization and Configuration exam

Accompanying course – CRM Customisation and Configuration

MB2-706 Microsoft Dynamics CRM Online Deployment exam

Accompanying course – CRM Online Deployment

MB2-708 Microsoft Dynamics CRM Installation exam

Accompanying course – CRM Online Deployment

MB2-720 Functional Application in Microsoft Dynamics Marketing exam

Accompanying course – Advanced Workshop for Microsoft Dynamics Marketing