We currently have an Exchange 2003 environment with users using Outlook 2007 and Outlook 2010. We have a user using Outlook 2010 and not able to see certain user's free/busy when trying to schedule a meeting. I can see it without a problem. The strange thing is all of the users are in a certain security group. The /cleanfreebusy switch didn't work and not having any luck finding info on the internet. Any ideas on what to check or things to try? Thanks in advance for the help.