I think the sentence means something along the lines of: "As for the contents of the meeting the other day, it will be reported in writing later."
But this kinda ignores the 次第です...
I'm used to thinking of 次第だ as meaning "depending on", but I don't see how it fits here. Looking in a dictionary, I see that 次第 can also mean "as soon as" when used with verbs, but that also seems off.
Any hints on what the 次第 means in this context?