@flo, if this is a dialogue within a single e-mail thread, more or less like this short example, where you read from bottom to top:
Ok, that’s all right then.
> I meant that we could go together.
>> Wait, I don’t want you picking out what I’m going to wear.
>>> I’ve made plans to go shopping for our costumes this afternoon.
the reason it’s bottom to top is that the correspondents are following the common practice of typing their responses above the ones they’re answering. Some people type below and some embed their answers, but most type above. It’s nothing automatic in Outlook.
The only way I could think of to show them in chronological sequence would be to manually reverse them all.
First you might try a File Save of the thread to see if it gives you a text file with times and dates embedded in it. That ought to make it easier, but it will still be a pain.
Alternatively, you could preface it by a note that says: “This is an e-mail thread written from bottom to top. To read chronologically, begin at the bottom.”