In the User Account Control dialog box, click Continue.3.
Schedule Free Busy information is published to a public folder for Microsoft Office Outlook® 2003 or earlier clients.
This event may occur if the public folder store, where Free Busy information is published, is in the Dismounted state.
Once it was fixed, I ran "Outlook /cleanfreebusy" from the run menu for every user via my login script and the problem was sorted.
You can also send a system wide meeting invite to force this info to be repaired as well.
Right-click the first zone, click Properties, and then click the Name Servers tab.5.