Restore archived email

I archived my emails from 21 days ago and beyond.
A folder was created called Archive with my email address in it. It is blank.

I now want to find a set of emails from 6 months ago. How do I do that?


I guess this option is not available then.
Which is a bit concerning that I have to keep all emails on my server as I get around 100 a day and it soon builds up quantity. I did think using archive would help with that.
Disappointing and I wish I had known that before I bought the license.
Now I will need to look for a more user friendly email client. Anyone know which is best?