I have a CAS array (just two servers) and an Exchange 2003/2010 co-existence environment. Users on the new server cannot view calendar info. However, it is showing up in OWA. I've confirmed that I've added the 2010 public folder database to the 2003 mailstore's and and the schedule/free busy is replicated also. I've enabled logging on the 2010 client and have that info if needed. Nothing seems to stand out. Any advice?

Have you tried recreating Outlook profile? Have you tried cleaning free/busy info in outlook - outlook.exe /cleanfreebusy ?With kind regards Krystian Zieja http://www.projectnenvision.com Follow me on twitter My Blog

I saw this happen after migrationg mailboxes from 2003 to 2010, and about the same time migrating users from Office 2003 to Office 2010 and many of my users had some issues viewing other users' Calendars properly. For us, removing the Calendars from their Shared Calendars list and recreating them took care of it.