As of March 31, 2019, the Office 365 70-346 and 70-347 exams will retire. Do you have any info about a replacement certification/exam? Microsoft doesn't seem to announce that, at least I haven't found it.
Replacement for Office 365 70-346 and 70-347?
Take a look at the following post, as it highlights the key items that you are asking about and also has links to the associated Microsoft information: