Log in to your Microsoft 365 (M365) account by going to office.com using your 8-character UWaterloo username @uwaterloo.ca (e.g. firstname.lastname@example.org) and password
Click on the Waffle menu
Click on OneDrive to launch the web app.
Select the file or folder you want to share by selecting the circle to the left of the item (hover over the name and the circle appears to the left). You can select single or multiple items to share.
Click on Share at the top of the page.
If the setting is not set to People you specify can edit, select the dropdown list. In the options presented, select the Specific People option. If you do not want people to edit your files, uncheck the Allow editing check box. Click Apply.
6. Enter the recipients' email addresses, and click Send. (You also have another opportunity to set the editing permissions by clicking on the pencil icon next to their email address.)