When will the D365 labs be available again

Question

Currently I am preparing for MB-920 through the self paced course on Learn (https://learn.microsoft.com/en-us/training/courses/mb-920t00)

Up till now I have found two exercises that can't be done because the labs are temporarily unavailable. One of my colleagues also ran into this last month and this hampers our ability to properly prepare.

So my (actually our) question is when can we expect the labs for the MB-920 course to be available again?

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