I completed the black-belt training 3-something years ago and found it very helpful. It has a good overview of both configuration and all components that are available in D365CE. I don't know if it is still current, knowing that v9.0 and the Unified Interface with Sales and Service hubs are the new way to go.
I was looking to continue my learning path with the MB2-715/716 exams, but found out that these are terminated and are being substituted by MB-200 and MB210. So before you dive into old(er) content, make sure you're investing your time in the course that's most valuable for you.Good luck to anyone on any course you might do for D365. Often it's not easy and a proper time-investment, but it WILL pay off! :-)
Also, thank you to Liz for sharing the link to that discussion we had a few months ago, I posted a long explanation about the Black Belt series and I think Nanci and others could benefit from reading my post on the thread and all the other posts from people who commented as well. :)
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