It had already dropped before the meeting, so the result doesn't matter anymore.

$BTC
The whole world knows that Microsoft shareholders have held a meeting.

Now the news is that they voted to reject Bitcoin.

Think about this question.

If you were a decision maker at Microsoft and decided to buy Bitcoin, would you tell the world before buying it?

Businesses are all profit-seeking. If shareholders approve it, will they publicly express their approval?

Isn't it obvious that they are buying it after the price has risen?

News are often a trick, which indicates that there will be action next.