We recently had a user have an issue where their updated photo in Microsoft Lync was being displayed properly to everyone but themselves. After a quick search of the Internet we found this suggestion which worked like a champ. It requires an easy registry delete and no computer restart.
Link: How to fix your photo not showing up in the Lync client
Microsoft Skype Photo is Not Updating February 10, 2015
Microsoft Skype Photo is Not Updating