In Microsoft Office Outlook 2003, Microsoft Office Outlook 2007, or in Microsoft Outlook 2010, you experience one of the following issues when you try to configure free/busy information or when you try to delegate information:
When you accept a meeting request or when you add a delegate to your mailbox, you receive the following error message:
Unable to save free/busy information
When you use the outlook.exe /cleanfreebusy command-line switch to start Outlook, you receive the following error message:
Unable to clean your local free/busy information.
When you try to add a delegate, you receive one of the following error messages:
The Delegates settings were not saved correctly. Unable to activate free/busy information.
The Delegates settings were not saved correctly. Unable to activate send-on-behalf-of list. You do not have sufficient permission to perform this operation on this object.
When you try to open a shared calendar item, you receive the following error message:
Can't open this item. Unable to open the free/busy information
Additionally, the following event is logged in the Application log on the Outlook client computer:
Event Type: Warning Event Source: Outlook Event Category: None Event ID: 25 Date: date Time: time User: N/A Computer: Computer_name Description: Unable to save free/busy information. Unable to open the free/busy information.
When a delegate tries to create an item in the shared calendar or in the manager calendar, the delegate receives the following error message:
Unable to open free/busy information
These issues occur because a mailbox property does not correctly reference a hidden message in the mailbox. The hidden message contains information that is related to any of the following features:
To resolve this issue, force the regeneration of hidden free/busy information in the mailbox.
After you follow the steps in this section, you may have to reconfigure settings that are related to the following features:
The steps in this section must be applied on the mailbox of the user who owns the Calendar folder. This is the mailbox on which you try to create the calendar items, use the /cleanfreebusy switch, or configure the delegate settings.
To force the regeneration of hidden free/busy information in the mailbox, follow these steps:
Make sure that there is an online mode profile for the mailbox.
Note If there is no online mode profile, use the Mail item in Control Panel to create an online mode profile for the mailbox.
Download the Microsoft Exchange Server Messaging API (MAPI) Editor tool (MfcMapi.exe). To do this, visit the following Microsoft Web site: