hebrew - Which pronunciation-permutation of "yod, hay vav, hay" is forbidden to pronounce?

@AvrohomYitzchok said that I should post this question as a new question. (He did not know the answer).

I was responding to a comment he made, which read

@Sarah When Rambam says "pronounces the name [of God] with its letters, yod, hay vav, hay" he means to articulate the name as it is written and not with the letters Alef Daleth Nun Yod (as we pronounce it). – Avrohom Yitzchok Jul 10 '16 at 20:18

And here is my question:

Does the pronunciation of "the name [of God] with its letters, yod, hay vav, hay" refer to the pronunciation as in the masoretic pointing of "yod, hay vav, hay" or to any pronunciation-permutation of "yod, hay vav, hay"?

I kindly request for a source for any answer. Thank you.