How to Update Your Microsoft 365 Profile Picture

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Find a photo you want to use and store it on your computer, OneDrive, or other location you can get to. The photo needs to be smaller than 4 MB and can be a .png, jpg, or .gif file.
Sign in to Microsoft 365 at portal.office.com.
Select the circle in the upper right hand corner of the page that shows your initials or an icon of a person.
In the pop menu that opens, hover your cursor over the circle and a "Add or change your picture" option should appear.
Click this option and then you may select the option to Upload a new photo.