An issue that was bothering me a bit for a while already, but not enough to actually look into it was that on my Lync client, my own profile picture would not be shown. Others would be able to see my picture, but I myself could not.
I figured it was bout time to take action on this. After raising a ticket with our helpdesk and several attempts to clear local caches, the answer was found today. Just in case someone else might stumble upon the same issue, I will share the steps how to resolve this here.
Thanks go out to my great Lync colleagues for figuring this one out!