One of our users is trying to view another person's Calendar Free/Busy Time. It comes back with no information. She's running Outlook 2007. The server environment is Exchange 2007 SP1 Rollup 10 on Windows 2003 R2 servers.
There is a registry entry that worked for some people but not for this user.
Refers to adding a registry entry to HKEY_CURRENT_USER\Software\Microsoft\Office\12.0\Outlook\Options\Calendar. Add DWORD UseLegacyFB and set it to 1. You'll have to close and restart Outlook.
Even this is not working for her. I tried opening her Outlook profile from Web Access and using the Scheduling Assistant, but again I was not able to view the calendar information. I then installed Outlook 2013 on a different client and tried to view the calendar with my profile but saw no information.