Logged in today (Oct 1st, 2018) and it said Outlook.com has been updated. The previous version remembers the folder in which I attached a file in previous email. Now each time I need to attach files in a new email, I have to navigate to the same folder again to find them. In the same email, it remembers, but not when I compose new emails.

You may ask, why not use the search feature? Well, if I need to attached multiple files from the same folder, the search-and-attach method is inefficient.

Secondly, when I search in OneDrive to find a file to attach, it indicates by the down arrow the default sort order is by date (newest at top.) But it's not. For example, I have 2016's files at top and bottom, while 2017 and 2018's in the middle of the list. Clicking the header to update the sort order doesn't help.