The complete information was shared in the morning meeting ofJune 6th.
In the morning meeting of June 6th, this information was made available to everyone.
朝礼はmorning meeting かmorning assembly です。
情報が展開しましたは英語でinformation was made available/ information was shared / information was unfolded で表現できます。
〇月△日は例えば06/2かJune 2nd か2nd June でいいです。