Since the beginning of June, the title of the certification program Microsoft Certified Application Specialist (MCAS) has been reverted back to Microsoft Office Specialist (MOS).
Moving to the term 'MCAS' was never popular. Microsoft states that: "The Microsoft Office Specialist (MOS) certification now extends to all versions of Microsoft Office, including the 2007 Microsoft Office System and Microsoft Office 2010, as well as Windows desktop operating systems."
MCAS holders are now automatically considered MOS 2007 certified. However, those that want a new certificate are being told that they will need to purchase one for a small fee.