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On the Navigation menu, point to Company profile, and click Users.
Open the required user profile and click Edit at the bottom of the page to switch to editing mode.
To upload avatar from your PC,
In the Upload file form, click Add.
Browse to the picture you want to upload.
To upload an avatar from an external web-source,
Click Upload via link to expand the form.
Locate mouse pointer into the bar and enter the web-link.
Click Upload, then Save.