Microsoft has officially retired their MS Project certification exam 74-343 Managing Projects. Though the exam has been retired as of July 31, 2019, those who have taken the exam will be recognized for competency until June 30, 2020.
The exam was designed for professionals who use(d) Project Standard, Project Professional, and Project Pro for Office 365 desktop features. It was primarily taken by those with a solid understanding of project management.
Those who took and passed the 74-343 Managing Projects exam achieved the certification titled, Microsoft Specialist: Microsoft Project 2013, and were also recognized as a Microsoft Certified Professional. The test was a requirement for earning a Professional in Project Management (PPM) certification.
If you’ve already taken the 74-343 examination and hold the certification, it is still recognized as a competency until 2020. Once a certification has been retired, it will no longer be able to be attained, but, if it has already earned, it will remain on your transcripts in the Active section on Microsoft Certified Professional portal/member sites.
The 74-343 examination does not currently credit towards any certification, though it used to when Specialist certifications were still available. Specialist certifications were officially retired in March 2017, and now Exam 74-343 has followed. This was a program change made as part of the Microsoft Certified Professional Program evolution, and is intended to strengthen the program overall by focusing on specialist certifications rather than exams.
You can see more details in Microsoft’s page