Written by Finally the day has come that we can upload pictures into Active Directory and actually use them in Exchange/Outlook. I have been wanted this for a looong time.
http://blogs.technet.com/ilvancri/archive/2009/11/17/upload-picture-in-outlook-2010-using-the-exchange-management-shell-exchange-2010.aspx
http://technet.microsoft.com/en-us/library/dd351252(EXCHG.140).aspx
I think this is such great news.
UPDATE: UPDATE: UPDATE:
Exchange teamblog released a walkthrough of Exchange GAL Pictures.
http://msexchangeteam.com/archive/2010/03/10/454223.aspx