As you have asked about the ranking and accreditation of the Master of Business Administration (MBA) program offered by International School of Management (ISM), I am giving you information about it, check below for the details

All ISM programs are fully accredited by the Accreditation Council for Business Schools and Programs (ACBSP)
It is recognized by the Council for Higher Education Accreditation (CHEA)
It is also affiliated to the European Association for Quality Assurance in Higher Education (ENQA)
ISM has been awarded the status of Candidate for Accreditation by the International Assembly for Collegiate Business Education (IACBE)

Recognition

US State Authority to Confer Diplomas
International School of Management is recognized by the French Ministry for Higher Education and Research.

Membership

ISM is a member of the Association to Advance Collegiate Schools of Business (AACSB International).
SM is an Institutional Member of the Association for Transnational Higher Education Accreditation (ATHEA),
ISM is a member of the American Chamber of Commerce in France.
ISM is a member of the Executive DBA Council.

Contact:
International School of Management
New York Office
110 E 59th Street
23rd Floor
New York, NY 10022, USA