You can display a photo of yourself in the Lync picture box, Simply Click on the cog icon (next to the user status section) Select Tools in the menu and the select options. The left hand column has an entry called My Picture - Select this and choose from the following 3 options:
- Do not show my picture
- Default corporate Profile
- Show a picture from a web address
Further information on each available by clicking the links.
Troubleshooting pictures in Lync 2010