To upload your files you worked on in your online M365 apps into other platforms (attach in email, upload to blackboard, etc.) you will need to download the file in the prefered file format/type, and then access it from your 'File Explorer' or 'Finder' (Mac users).
Download File as PDF
Select 'File' in the top right corner of your file you have been working on.
Click the '>' next to the 'Export' on the drop down.
Select 'Download as PDF'
4. Select the 'Download' button on the Microsoft popup.
5. You will find your downloaded file in your 'Downloads' tab of your 'File Explorer' or 'Finder'
Download a Copy - Save As
Select 'File' in the top right corner of your file you have been working on.
Click the '>' next to the 'Create a Copy' on the drop down.
Select 'Download a Copy'
Select what file you would like to 'Save' a copy of the document on.